KETOROLACO DERIVATIVE, PHARMACEUTICAL COMPOSITION AND PREPARATION METHOD THEREFOR AND USE THEREOF

Abstract

A ketorolaco derivative as shown in formula (I) has a better half-life and stability, has good pharmacokinetic properties, and has a higher stability in vitro; and as a preparation, the ketorolaco derivative can enhance efficacy and reduce toxicity. The present invention well improves the defects of frequent administration, gastrointestinal side effects, poor compliance and the like in traditional ketorolaco preparations.

##STR00001##

Claims

1. A compound represented by formula (I) and a racemate, a stereoisomer, a pharmaceutically acceptable salt or a solvate thereof, ##STR00047## wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different and are each independently selected from hydrogen, C.sub.1-40 alkyl, C.sub.2-40 alkenyl, C.sub.2-40 alkynyl, C.sub.1-40 alkoxy, C.sub.3-40 cycloalkyl, C.sub.3-40 cycloalkyloxy, 3-20 membered heterocyclyl, C.sub.6-20 aryl unsubstituted or substituted with Ra, 5-20 membered heteroaryl unsubstituted or substituted with Ra, and 3-20 membered heterocyclyl substituted with one, two or more Ra; each Ra is identical or different and is each independently selected from halogen, C.sub.1-40 alkyl, C.sub.1-40 alkoxy, and C.sub.6-20 arylacyl.

2. The compound according to claim 1, wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different and are each independently selected from hydrogen, C.sub.1-20 alkyl, C.sub.2-20 alkenyl, C.sub.2-20 alkynyl, C.sub.1-20 alkoxy, C.sub.3-20 cycloalkyl, C.sub.3-20 cycloalkyloxy, 5-10 membered heterocyclyl, C.sub.6-14 aryl unsubstituted or substituted with Ra, 5-14 membered heteroaryl unsubstituted or substituted with Ra, and 5-14 membered heterocyclyl substituted with one, two or more Ra; each Ra is identical or different and is each independently selected from halogen, C.sub.1-20 alkyl, C.sub.1-20 alkoxy, and C.sub.6-20 arylacyl.

3. The compound according to claim 1, wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different and are each independently selected from hydrogen, C.sub.1-8 alkyl, C.sub.2-8 alkenyl, C.sub.2-8 alkynyl, C.sub.1-8 alkoxy, C.sub.3-8 cycloalkyl, C.sub.3-8 cycloalkyloxy, 5-10 membered heterocyclyl, C.sub.6-10 aryl unsubstituted or substituted with Ra, 5-10 membered heteroaryl unsubstituted or substituted with Ra, and 5-10 membered heterocyclyl substituted with one, two or more Ra; each Ra is identical or different and is each independently selected from C.sub.6-10 arylacyl.

4. The compound according to claim 1, wherein R.sub.1, R.sub.2 and R.sub.3 are identical or different and are each independently selected from hydrogen, C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.1-6 alkoxy, C.sub.3-6 cycloalkyl, C.sub.3-6 cycloalkyloxy, 5-8 membered heterocyclyl, C.sub.6-8 aryl unsubstituted or substituted with Ra, 5-8 membered heteroaryl unsubstituted or substituted with Ra, and 5-8 membered heterocyclyl substituted with one, two or more Ra; each Ra is identical or different and is each independently selected from C.sub.6-10 arylacyl, such as benzoyl.

5. The compound according to claim 1, wherein R.sub.1 is selected from hydrogen, methyl, ethyl, isopropyl, isobutyl, tent-butyl, cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl; R.sub.2 is selected from hydrogen, methyl, ethyl, isopropyl, isobutyl, tent-butyl, cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl; R.sub.3 is selected from methyl, ethyl, isopropyl, tent-butyl, isobutyl, n-butyl, n-pentyl, n-hexyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, methoxy, ethoxy, isopropoxy, tert-butoxy, isobutoxy, n-octyloxy, cyclopropyloxy, cyclobutoxy, cyclopentyloxy, cyclohexyloxy, and ##STR00048## indicates a connection site.

6. The compound according to claim 1, wherein the compound represented by formula (I) is selected from the following structures: ##STR00049## ##STR00050## ##STR00051## ##STR00052## ##STR00053## preferably, the compound represented by formula (I) is preferably a levorotatory enantiomer thereof, for example selected from the following structures: ##STR00054##

7. A preparation method for the compound represented by formula (I) according to claim 1, comprising reacting the following compound 1 with compound 2 to give the compound represented by formula (I): ##STR00055## wherein R.sub.1, R.sub.2 and R.sub.3 are all independently defined as in claim 1; L is selected from a leaving group, such as halogen and hydroxy; the compound 1 is selected from a racemic ketorolac, ketorolac having an R configuration and ketorolac having an S configuration, i.e., from (±)-5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid, (R)-5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid, and (S)-5-benzoyl-2,3 -dihydro-1H-pyrrolizine-1-carboxylic acid; preferably, the compound 2 is selected from the following compound 3 and compound 4: ##STR00056## wherein R.sub.1, R.sub.2 and R.sub.3 are all independently defined as in claim 1; X is selected from chlorine, bromine and iodine.

8. The preparation method according to claim 7, wherein the preparation method can be performed in the presence of an organic solvent; the organic solvent can be selected from at least one of the following: acetone, dimethyl sulfoxide, N,N-dimethylformamide, ethers, such as ethyl propyl ether, a n-butyl ether, anisole, phenetole, cyclohexyl methyl ether, dimethyl ether, diethyl ether, dimethyl ethylene glycol, diphenyl ether, dipropyl ether, diisopropyl ether, di-n-butyl ether, diisobutyl ether, diisopentyl ether, dimethoxyethane, isopropyl ethyl ether, methyl tent-butyl ether, tetrahydrofuran, methyl tetrahydrofuran, dioxane, dichlorodiethyl ether, and polyethers of ethylene oxide and/or propylene oxide; aliphatic, cycloaliphatic or aromatic hydrocarbons, such as pentane, hexane, heptane, octane, nonane, and hydrocarbons possibly substituted with fluorine and chlorine atoms, such as methylene chloride, dichloromethane, trichloromethane, carbon tetrachloride, fluorobenzene, chlorobenzene or dichlorobenzene; cyclohexane, methylcyclohexane, petroleum ether, octane, benzene, toluene, chlorobenzene, bromobenzene, and xylene; and esters, such as methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate and dimethyl carbonate, dibutyl carbonate or ethylene carbonate; preferably, the preparation method can be performed in the presence of a acid binding agent, such as a base; the base can be an organic base or an inorganic base; for example, the inorganic base may be selected from at least one of the following: hydrides, hydroxides, alkoxides, acetates, fluorides, phosphates, carbonates and bicarbonates of alkali metals and alkaline earth metals; preferred bases are sodium amide, sodium hydride, lithium diisopropylamide, sodium methoxide, potassium tert-butoxide, sodium hydroxide, potassium hydroxide, sodium acetate, sodium phosphate, potassium phosphate, potassium fluoride, cesium fluoride, sodium carbonate, potassium carbonate, potassium bicarbonate, sodium bicarbonate and cesium carbonate; the organic base can be selected from at least one of the following: tertiary amines, substituted or unsubstituted pyridines and substituted or unsubstituted triethylamine, trimethylamine, diisopropylethylamine, tri-n-propylamine, tri-n-butylamine, tri-n-hexylamine, tricyclohexylamine, N-methylcyclohexylamine, N-methylpyrrolidine, N-methylpiperidine, N-ethylpiperidine, N,N-dimethylaniline, N-methylmorpholine, pyridine, 2,3- or 4-methylpyridine, 2-methyl-5-ethylpyridine, 2,6-dimethylpyridine, 2,4,6-trimethylpyridine, 4-dimethylaminopyridine, quinoline, methyl quinoline, N,N,N,N-tetramethylethylenediamine, N,N-dimethyl-1,4-diazacyclohexane, N,N-diethyl-1,4-diazabicyclocyclohexane, 1,8-bis(dimethylamino)naphthalene, diazabicyclooctane (DABCO), diazabicyclononane (DBN), diazabicycloundecane (DBU), butylimidazole and methylimidazole; preferably, the preparation method can be performed in the presence of a catalyst, for example a phase transfer catalyst; the catalyst can be selected from tetrabutylammonium bromide (TBAB), tetrabutylammonium chloride (TBAC), tetrabutylammonium iodide (TBAI), potassium iodide, sodium iodide and 18-crown-6; preferably, a reaction temperature of the preparation method is −5-80° C., for example, 0-50° C.; preferably, a reaction time of the preparation method is 0.5-24 h, for example, 1-12 h.

9. Use of the compound represented by formula (I) and the racemate, the stereoisomer, the pharmaceutically acceptable salt or the solvate thereof according to claim 1, for the manufacturing of a non-steroidal anti-inflammatory medicament; the drug is preferably used for anti inflammation and/or analgesia in rheumatoid arthritis, lumbago, migraine, neuralgia, scapulohumeral periarthritis, osteoarthritis, and neck-shoulder-wrist syndrome, analgesia and/or anti inflammation after surgery, trauma or tooth extraction, and relieving fever and/or analgesia in acute upper respiratory tract inflammation.

10. A pharmaceutical composition comprising a therapeutically effective amount of the compound represented by formula (I) and the racemate, the stereoisomer, the pharmaceutically acceptable salt or the solvate thereof according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0059] FIG. 1 is a hydrogen spectrum of the compound N2 of the present disclosure.

[0060] FIG. 2 is a hydrogen spectrum of the compound N8 of the present disclosure.

[0061] FIG. 3 is a hydrogen spectrum of the compound N12 of the present disclosure.

[0062] FIG. 4 is a hydrogen spectrum of the compound N15 of the present disclosure.

[0063] FIG. 5 is a hydrogen spectrum of the compound N16 of the present disclosure.

[0064] FIG. 6 is a line graph of the degradation rate of the compound N2 of the present disclosure in human plasma.

[0065] FIG. 7 is a line graph of the degradation rate of the compound N8 of the present disclosure in human plasma.

[0066] FIG. 8 is a line graph of the degradation rate of the compound N12 of the present disclosure in human plasma.

[0067] FIG. 9 is a line graph of the degradation rate of the compound N15 of the present disclosure in human plasma.

[0068] FIG. 10 is a liquid chromatogram of the degradation of the compound N15 of the present disclosure in human plasma.

[0069] FIG. 11 is a line graph of the degradation rate of the compound N16 of the present disclosure in human plasma.

[0070] FIG. 12 is a line graph of the degradation rate of the compound N11 of the present disclosure in human plasma.

[0071] FIG. 13 is a liquid chromatogram of the degradation of the compound N11 of the present disclosure in human plasma.

[0072] FIG. 14 is a line graph of the degradation rate of the compound PFA of the present disclosure in human plasma.

[0073] FIG. 15 is a flowchart of the enzymolysis kinetics experiment for the compound of the present disclosure.

[0074] FIG. 16 is a line graph of the degradation rate of the compound N26 of the present disclosure in human plasma.

[0075] FIG. 17 is a line graph of the degradation rate of the compound N27 of the present disclosure in human plasma.

DEFINITIONS AND DESCRIPTION

[0076] Unless otherwise stated, the definitions of groups and terms described in the specification and claims of the present application, including definitions thereof as examples, exemplary definitions, preferred definitions, definitions documented in tables, definitions of specific compounds in the examples, and the like, may be arbitrarily combined and incorporated with each other. The definitions of groups and the structures of the compounds in such combinations and incorporations should fall within the scope of the present specification.

[0077] Unless otherwise stated, a numerical range set forth in the description and claims shall be construed as at least including each specific integer within the range. For example, the numerical range “1-40” is equivalent to recording each integer value in the numerical range “1-10”, i.e., 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, and each integer value in the numerical range “11-40”, i.e., 11, 12, 13, 14, 15, . . . , 35, 36, 37, 38, 39 and 40. It should be understood that when one, two or more are used to describe a substituent herein, “more” shall mean an integer ≥3, such as 3, 4, 5, 6, 7, 8, 9 or 10. In addition, when a certain numerical range is defined as “numbers”, it shall be construed as recording both endpoints of the range, each integer within the range, and each decimal within the range. For example, “numbers of 0-10” shall be construed as including not only each of integers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, but also at least the sums of each integer and 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9.

[0078] The term “halogen” refers to fluorine, chlorine, bromine and iodine.

[0079] The term “C.sub.1-40 alkyl” preferably refers to a linear or branched saturated monovalent hydrocarbyl group having 1-40 carbon atoms. For example, “C.sub.1-10 alkyl” refers to a linear or branched alkyl group having 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms and “C.sub.1-6 alkyl” refers to a linear or branched alkyl group having 1, 2, 3, 4, 5 or 6 carbon atoms. The alkyl is, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, 2-methylbutyl, 1-methybutyl, 1-ethylpropyl, 1,2-dimethylpropyl, neopentyl, 1,1-dimethylpropyl, 4-methylpentyl, 3-methylpentyl, 2-methylpentyl, 1-methylpentyl, 2-ethylbutyl, 1-ethylbutyl, 3,3-dimethylbutyl, 2,2-dimethylbutyl, 1,1-dimethylbutyl, 2,3-dimethylbutyl, 1,3-dimethylbutyl, 1,2-dimethylbutyl, etc., or isomers thereof.

[0080] The term “C.sub.2-40 alkenyl” preferably refers to a linear or branched monovalent hydrocarbyl comprising one or more double bonds and having 2-40 carbon atoms, preferably “C.sub.2-10 alkenyl”. The “C.sub.2-10 alkenyl” preferably refers to a linear or branched monovalent hydrocarbyl comprising one or more double bonds and having 2, 3, 4, 5. 7, 8, 9 or 10 carbon atoms, for example, having 2, 3, 4, 5 or 6 carbon atoms (i.e., C.sub.2-6 alkenyl) or having 2 or 3 carbon atoms (i.e., C.sub.2-3 alkenyl). It should be understood that in the case that the alkenyl comprises more than one double bond, the double bonds can be separated from one another or conjugated. The alkenyl is, for example, vinyl, allyl, (E)-2-methylvinyl, (Z)-2-methylvinyl, (E)-but-2-enyl, (Z)-but-2-enyl, (Z)-but-1-enyl, pent-4-enyl, (E)-pent-3-enyl, (Z)-pent-3-enyl, (E)-pent-2-enyl, (Z)-pent-2-enyl, (E)-pent-1-enyl, (Z)-pent-1-enyl, hex-5-enyl, (E)-hex-4-enyl, (Z)-hex-4-enyl (E)-hex-3-enyl, (Z)-hex-3-enyl, (E)-hex-2-enyl, (Z)-hex-2-enyl, (E)-hex-1-enyl, (Z)-hex-1-enyl, isopropenyl, 2-methylprop-2-enyl, 1-methylprop-2-enyl, 2-methylprop-1-enyl, (E)-1-methylprop-1-enyl, (Z)-1-methylprop-1-enyl, 3-methylbut-3-enyl, 2-methylbut-3-enyl, 1-methylbut-3-enyl, 3-methylbut-2-enyl, (E)-2-methylbut-2-enyl, (Z)-2-methylbut-2-enyl, (E)-1-methylbut-2-enyl, (Z)-1-methylbut-2-enyl, (E)-3-methybut-1-enyl, (Z)-3-methylbut-1-enyl, (E)-2-methybut-1-enyl, (Z)-2-methylbut-1-enyl, (E)-1-methylbut-1-enyl, (Z)-1-methylbut-1-enyl, 1,1-dimethylprop-2-enyl, 1-ethylprop-1-enyl, 1-propylvinyl or 1-isopropylvinyl.

[0081] The term “C.sub.2-40 alkynyl” refers to a linear or branched monovalent hydrocarbyl comprising one or more triple bonds and having 2-40 carbon atoms, preferably “C.sub.2-10 alkynyl”. The term “C.sub.2-10 alkynyl” preferably refers to a linear or branched monovalent hydrocarbyl comprising one or more triple bonds and having 2, 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms, for example, having 2, 3, 4, 5 or 6 carbon atoms (i.e., “C.sub.2-6 alkynyl”) or having 2 or 3 carbon atoms (“C.sub.2-3 alkynyl”). The alkynyl is, for example, ethynyl, prop-1-ynyl, prop-2-ynyl, but-1-ynyl, but-2-ynyl, but-3-ynyl, pent-1-ynyl, pent-2-ynyl, pent-3-ynyl, pent-4-ynyl, hex-1-ynyl, hex-2-ynyl, hex-3-ynyl, hex-4-ynyl, hex-5-ynyl, 1-methylprop-2-ynyl, 2-methylbut-3-ynyl, 1-methylbut-3-ynyl, 1-methylbut-2-ynyl, 3-methylbut-1-ynyl, 1-ethyl prop-2-ynyl, 3-methylpent-4-ynyl, 2-methylpent-4-ynyl, 1-methylpent-4-ynyl, 2-methylpent-3-ynyl, 1-methylpent-3-ynyl, 4-methylpent-2-ynyl, 1-methylpent-2-ynyl, 4-methylpent-1-ynyl, 3-methylpent-1-ynyl, 2-ethylbut-3-ynyl, 1-ethylbut-3-ynyl, 1-ethylbut-2-ynyl, 1-propylprop-2-ynyl, 1-isopropylprop-2-ynyl, 2,2-dimethylbut-3-ynyl, 1,1-dimethylbut-3-ynyl, 1,1-dimethylbut-2-ynyl or 3,3-dimethylbut-1-ynyl, In particular, the alkynyl is ethynyl, prop-1-ynyl or prop-2-ynyl.

[0082] The term “C.sub.3-40 cycloalkyl” refers to a saturated monovalent monocyclic or bicyclic hydrocarbon ring or bridged cycloalkane having 3-40 carbon atoms, preferably “C.sub.3-40 cycloalkyl”. The term “C.sub.3-10, cycloalkyl” refers to a saturated monovalent monocyclic or bicyclic hydrocarbon ring or bridged cycloalkane having 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms. The C.sub.3-10 cycloalkyl may be a monocyclic hydrocarbyl such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl or cyclodecyl, or may be a bicyclic hydrocarbyl such as a decahydronaphthalene ring. The term “3-20 membered heterocyclyl” refers to a saturated monovalent monocyclic or bicyclic hydrocarbon ring or bridged cycloalkane, which is a non-aromatic cyclic group with a total number of 3-20 (such as 3, 4, 5, 6, 7, 8, 9 and 10) ring atoms comprising 1-5 heteroatoms independently selected from N, O and S, preferably a “3-10 membered heterocyclyl”. The term “3-10 membered heterocyclyl” refers to a saturated monovalent monocyclic or bicyclic hydrocarbon ring or bridged cycloalkane comprising 1-5, preferably 1-3, heteroatoms selected from N, O and S. The heterocyclyl may be connected to the rest of the molecule through any of the carbon atoms or the nitrogen atom (if present). In particular, the heterocyclyl may include, but is not limited to: 4-membered rings such as azetidinyl and oxetanyl; 5-membered rings such as tetrahydrofuranyl, dioxolyl, pyrrolidinyl, imidazolidinyl, pyrazolidinyl and pyrrolinyl; 6-membered rings such as tetrahydropyranyl, piperidyl, morpholinyl, dithianyl, thiomotpholinyl, piperazinyl and trithianyl; or 7-membered rings such as diazepanyl. Optionally, the heterocyclyl may be benzo-fused. The heterocyclyl may be bicyclic, for example, but not limited to, a 5,5-membered ring such as pyrrolizine, a hexahydrocyclopenta[c]pyrrol-2(1H)-yl ring, or a 5,6-membered bicyclic ring such as a hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl ring. The ring containing nitrogen atoms may be partially unsaturated, i.e., it may contain one or more double bonds, for example, but not limited to, 2,5-dihydro-1H-pyrrolyl, 4H-[1,3,4]thiadiazinyl, 4,5-dihydrooxazolyl or 4H-[1,4]thiazinyl, or it may be benzo-fused, for example, but not limited to, dihydroisoquinolyl. According to the present disclosure, the heterocyclyl is non-aromatic. When the 3-20 membered heterocyclyl is connected to another group to form the compound of the present disclosure, the group may be connected to the carbon atom on the 3-20 membered heterocyclyl, or may be connected to the heteroatom on the 3-20 membered heterocyclyl. For example, when the 3-20 membered heterocyclyl is selected from piperazinyl, the group may be connected to the nitrogen atom on the piperazinyl. Alternatively, when the 3-20 membered heterocyclyl is selected from piperidinyl, the group may be connected to the nitrogen atom on the piperidinyl or the carbon atom in the para position.

[0083] The term “C.sub.6-20 aryl” preferably refers to an aromatic or partially aromatic monovalent monocyclic, bicyclic or tricyclic hydrocarbon ring having 6-20 carbon atoms, preferably “C.sub.6-14 aryl”. The term “C.sub.6-14 aryl” preferably refers to an aromatic or partially aromatic monovalent monocyclic, bicyclic or tricyclic hydrocarbon ring having 6, 7, 8, 9, 10, 11, 12, 13 or 14 carbon atoms (“C.sub.6-14 aryl”), in particular a ring having 6 carbon atoms (“C.sub.6 aryl”), such as phenyl or biphenyl, a ring having 9 carbon atoms (“C.sub.9 aryl”), such as indanyl or indenyl, a ring having 10 carbon atoms (“C.sub.10 aryl”), such as tetrahydronaphthyl, dihydronaphthyl or naphthyl, a ring having 13 carbon atoms (“C.sub.13 aryl”), such as fluorenyl, or a ring having 14 carbon atoms (“C.sub.14 aryl”), such as anthryl. When the C.sub.6-20 aryl is substituted, it may be monosubstituted or polysubstituted. In addition, the substitution site is not limited, and may be, for example, ortho-substitution, para-substitution, or meta-substitution.

[0084] The term “5-20 membered heteroaryl” refers to a monovalent aromatic monocyclic, bicyclic or tricyclic ring system which has 5-20 ring atoms and comprises 1-5 heteroatoms independently selected from N, O and S, such as “5-14 membered heteroaryl”. The term “5-14 membered heteroaryl” refers to a monovalent aromatic monocyclic, bicyclic or tricyclic ring system which has 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 ring atoms, in particular 5, 6, 9 or 10 carbon atoms, comprises 1-5, preferably 1-3 heteroatoms each independently selected from N, O and S, and may be benzo-fused in each case. In particular, the heteroalyl is selected from thienyl, furanyl, pyrrolyl, oxazolyl, thiazolyl, imidazolyl, pyrazolyl, isoxazolyl, isothiazolyl, oxadiazolyl, triazolyl, thiadiazolyl, thia-4H-pyrazolyl and the like, and benzo derivatives thereof such as benzofuranyl, benzothienyl, benzoxazolyl, benzoisoxazolyl, benzimidazolyl, benzotriazolyl, indazolyl, indolyl, and isoindolyl; or pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl and the like, and benzo derivatives thereof such as quinolyl, quinazolinyl, and isoquinolyl; or azocinyl, indolizinyl, purinyl and the like, and benzo derivatives thereof; or cinnolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, naphthyridinyl, pteridinyl, carbazolyl, acridinyl, phenazinyl, phenothiazinyl, phenoxazinyl, and the like. When the 5-20 membered heteroaryl is connected to another group to form the compound of the present disclosure, the group may be connected to the carbon atom on the 5-20 membered heteroaryl ring, or may be connected to the heteroatom on the 5-20 membered heteroaryl ring. When the 5-20 membered heteroaryl is substituted, it may be monosubstituted or polysubstituted. In addition, the substitution site is not limited. For example, hydrogen connected to the carbon atom on the heteroaryl ring may be substituted, or hydrogen connected to the heteroatom on the heteroaryl ring may be substituted.

[0085] Unless otherwise stated, the heterocyclyl, heteroaryl or heteroarylene includes all possible isomeric forms thereof, e.g., positional isomers thereof Thus, for some illustrative non-limiting examples, forms that involving substitutions at or bonding to other groups at one, two or more of positions 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and the like (if present) are included, including pyridin-2-yl, pyridinylene-2-yl, pyridin-3-yl, pyridinylene-3-yl, pyridin-4-yl and pyridinylene-4.-yl; thienyl or thienylene, including thien-2-yl, thien-2-ylene, thien-3-yl, and thien-3-ylene; pyrazol-1-yl, pyrazol-3-yl, pyrazol-4-yl and pyrazol-5-yl.

[0086] Unless otherwise indicated, the definitions of the terms herein are also applicable to groups comprising the terms, e.g., the definition of C.sub.1-40 cycloalkyl is also applicable to C.sub.1-40 cycloalkyloxy. It can be understood by those skilled in the art that the compound represented by formula (I) may exist in the form of various pharmaceutically acceptable salts. if these compounds have basic centers, they can form acid addition salts; if these compounds have acidic centers, they can form base addition salts; if these compounds contain both acidic centers (e.g., carboxyl) and basic centers (e.g., amino), they can also form internal salts. Acid addition salts include, but are not limited to: hydrochloride, hydrofluoride, hydrobromide, hydroiodide, sulphate, pyrosulphate, phosphate, nitrate, methanesulphonate, ethanesulphonate, 2-hydroxyethanesulphonate, benzenesulphonate, toluenesulphonate, sulphamate, 2-naphthalenesulphonate, formate, acetoacetic acid, pyruvic acid, laurate, cinnamate, benzoate, acetate, di hydroxyacetate, trifluoroacetate, pivalate, propionate, butyrate, hexanoate, heptanoate, undecanoate, stearate, ascorbate, camphorate, camphorsulphonate, citrate, fumarate, malate, maleate, hydroxymaleate, oxalate, salicylate, succinate, gluconate, quinate, pamoate, glycolate, tartrate, lactate, 2-(4-hydroxybenzoyl)benzoate, cyclopentanepropionate, digluconate, 3-hydroxy-2-naphthoate, nicotinate, embonate, pectinate, 3-phenylpropionate, picrate, pivalate, itaconate, triflate, dodecyl sulfate, p-toluenesulfonate, napadisylate, malonate, adipate, alginate, mandelate, glucoheptonate, glycerophosphate, sulfosalicylate, hemisulfate or thiocyanate, aspartate, and the like; base addition salts, such as alkali metal salts, alkaline earth metal salts, ammonium salts and the like, specifically include, but are not limited to: sodium salt, lithium salt, potassium salt, ammonium salt, aluminum salt, magnesium salt, calcium salt, barium salt, iron salt, ferrous salt, manganese salt, manganous salt, zinc salt, ammonium salt (including salt with NH.sub.3 and organic amine NH.sub.4 salt), methylammonium salt, trimethylammonium salt, diethylammonium salt, triethylammonium salt, propylamine salt, tripropylammonium salt, isopropylammonium salt, tert-butyl ammonium salt, N,N′-dibenzylethylenediamine salt, dicyclohexylammonium salt, 1,6-hexadimethrine ammonium salt, benzylammonium salt, ethanolamine salt, N,N-dimethylethanolamine salt, N,N-diethylethanolamine salt, triethanolamine salt, tromethamine salt, lysine salt, arginine salt, hi stidine salt, glucose ammonium salt, N-methylglucamine salt, dimethylgluca.mmonium salt, ethylgucammonium salt, meglumine salt, betaine salt, caffeine salt, chloroprocaine salt, procaine salt, lidocaine salt, pyridine salt, picoline salt, piperidine salt, morpholine salt, piperazine salt, purine salt, theobromine salt, and choline salt), and the like.

[0087] The compound disclosed herein may exist in the form of a solvate (e.g., hydrate), and the compound disclosed herein contains a polar solvent as a structural element of the crystal lattice of the compound, particularly, for example, water, methanol or ethanol. The amount of polar solvent, especially water, can exist in a stoichiometric or non-stoichiometric ratio.

[0088] According to the molecular structure, the compounds disclosed herein may be chiral and may therefore exist in various enantiomeric forms. These compounds may therefore exist in racemic or optically active form. The compounds disclosed herein or intermediates thereof may be separated into enantiomers by chemical or physical methods well known to those skilled in the art, or used in this form for synthesis. In the case of racemic amines, diastereoisomers are manufactured from mixtures by reaction with optically active resolving agents. Examples of suitable resolving agents are optically active acids such as R- or S-tartaric acid, diacetyltartatic acid, dibenzoyitartaric acid, mandelic acid, malic acid, lactic acid, suitable N-protected amino acids (e.g., N-benzoylproline or N-benzenesulfonylproline) or various optically active camphorsulfonic acids. Enantiomeric resolution by chromatography can be advantageously performed with the aid of optically active resolving agents, such as dinitrobenzoyl phenyl glycine, cellulose triacetate or other carbohydrate derivatives or chirally derivatized methacrylate polymers immobilized on silica gel. Suitable eluents for this purpose are mixtures of solvent containing water or alcohol, for example, hexane/isopropanol/acetonitrile.

[0089] The corresponding stable isomers can be separated according to known methods, such as extraction, filtration or column chromatography.

[0090] The term “leaving group” refers to is an atom or a group of atoms that is replaced as stable species and takes the bound electrons as it leaves in a chemical reaction. Preferably, the leaving group is selected from: halogen (e.g. chlorine, bromine or iodine), hydroxy, C.sub.1-40 haloalkyl, mesyloxy, p-toluenesulfonyloxy, trifluoromethanesulfonyloxy, nonafluorobutanesulfonyloxy, (4-bromobenzene)sulfonyloxy, (4-nitrobenzene)sulfonyloxy, (2-nitrobenzene)sulfonyloxy, (4-isopropylbenzene)sulfonyloxy, (2,4,6-triisopropylbenzene)sulfonyloxy, (2,4,6-trimethylbenzene)sulfonyloxy, (4-tert-butylbenzene)sulfonyloxy, benzenesulfonyloxy and (4-methoxybenzene)sulfonyloxy.

[0091] The term “patient” refers to any animal including mammals, preferably mice, rats, other rodents, rabbits, dogs, cats, pigs, cattle, sheep, horses or primates, and most preferably humans.

[0092] The term “therapeutically effective amount” refers to the amount of the active compound or drug that causes a biological or medical response that researchers, veterinarians, physicians, other clinicians, etc., are looking for in tissues, systems, animals, individuals or humans, including one or more of the following effects: (1) disease prevention: for example, the prevention of a disease, disorder or condition in an individual who is susceptible to the disease, disorder or condition but has not yet experienced or exhibited the pathology or symptoms of the disease; (2) disease inhibition: for example, the inhibition of a disease, disorder or condition in an individual who is experiencing or exhibiting the pathology or symptoms of the disease, disorder or condition.(i.e., the prevention of the further development of the pathology and/or symptoms); and (3) disease alleviation: for example, the alleviation of a disease, disorder or condition in an individual who is experiencing or exhibiting the pathology or symptoms of the disease, disorder or condition (i.e., the reverse of the pathology and/or symptoms).

DETAILED DESCRIPTION

[0093] The technical scheme of the present disclosure will be further illustrated in detail with reference to the following specific examples. It should be understood that the following examples are merely exemplary illustration and explanation of the present disclosure, and should not be construed as limiting the protection scope of the present disclosure. All techniques implemented based on the content of the present disclosure described above are encompassed within the protection scope of the present disclosure.

[0094] Unless otherwise stated, the starting materials and reagents used in the following examples are all commercially available products or can be manufactured by using known methods.

EXAMPLE 1

Synthesis of Compound N2

[0095] ##STR00018##

[0096] Ketorolac (4.401 g, 1724 mmol) was weighed into a dry two-necked reaction flask at room temperature, and 8.0 mL of DMSO was added and stirred to dissolve ketorolac. Potassium fluoride KF (2.205 g, 38.00 mmol) was weighed and added to the reaction flask described above, the reaction flask was purged with Ar for 2 times, and 1-chloroethyl isopropyl carbonate (6.9 g, 18.88 mmol) was weighed and added dropwise to the reaction flask described above. After the dropwise addition was completed, the reaction flask was placed at 35° C. and reacted for 1 h. TBAB (1.385 g, 4.30 mmol) and potassium iodide KI (1.430 g, 8.61 mmol) were then added to the reaction flask, followed by overnight stirring. 20 mL of water and 30 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, the EA layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated. NaCl aqueous solution, dried over anhydrous Na.sub.2SO.sub.4, and concentrated, and the residue was subjected to column chromatography (wet loading, PE/EA=6:1) to give a colorless oil (4,507 g, yield: 82,27%);

[0097] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8188-7.7980 (m, 2H), 7.5470-7.5104 (m, 1H), 7.4672-7.4302 (t, 2H, J=7.1 Hz), 6.8288-6.7883 (m, 2H), 6.1141-6.1042 (d, 1H, J=4.0 Hz), 4.9543-4.8513 (m, 1H), 4.6028-4.5372 (m, 1H), 4.4778-4.4116(m, 1H), 4.1087-4.072.0 (m, 1H), 2.9997-2.9157 (m, 1H), 2.8462-2.7553 (m, 1H), 1.5566-1.4431 (m, 3H), 1.3291-1.3094 (m, 6H);

[0098] ESI-MS m/z=386.1, [M+H].sup.+.

EXAMPLE 2

Synthesis of Compound N2(S)

[0099] ##STR00019##

[0100] The synthesis method of compound N1(S) is the same as that of compound a, except that ketorolac was replaced with S-ketorolac;

[0101] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8188-7.7980 (m, 2H), 7.5470-7.5104 (m, 1H), 7.4672-7.4302 (t, 2H, J=7.1 Hz), 6.8288-6.7883 (m, 2H), 6.1141-6.1042 (d, 1H, J=4.0 Hz), 4.9543-4.8513 (m, 1H), 4.6028-4.5372 (m, 1H), 4.4778-4.4116 (m, 1H), 4.1087-4.0720 (m, 1H), 2.9997-2.9157 (m, 1H), 2.8462-2.7553 (m, 1H), 1.5566-1.4431 (m, 3H), 1.3291-1.3094 (m, 6H);

[0102] ESI-MS m/z=386.1, [M+H].sup.+.

EXAMPLE 3

Synthesis of Compound N3

[0103] ##STR00020##

[0104] Synthesis of 1-bromopropyl acetate: ZnCl.sub.2 (0.020 g, 0.15 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N2 for 2 times, then 40 mL of anhydrous dichloromethane and acetyl bromide (4.0 g, 32.53 mmol) were added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. n-propionaldehyde (2.064 g, 35.54 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (4.4 g, crude), namely 1-bromopropyl acetate, which was used directly in the next reaction step without further purification;

[0105] Synthesis of compound N3: ketorolac (1.0 g, 3.92 mmol) and KHCO.sub.3 (0.628 g, 6.27 mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 1.4 g of fresh-synthesized 1-bromopropyl acetate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was kept at room temperature under constant stirring for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=7:1) to give compound N3 (1.14 g, yield: 82%);

[0106] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8210-7.7970 (m, 2H), 7.5465-7.5033 (m, 1H), 7.4644-7.4274 (m, 2H), 6.8211-6.8084 (dd, 1H, J=1.2,3.9 Hz), 6.7967-6.7695 (t, J=5.4 Hz, 1H), 6.1057-6.0858 (m, 1H), 4.6092-4.5359 (m, 1H), 4.4870-4.4032 (m, 1H), 4.1267-4.0606 (m, 1H), 2.9964-2.7485 (m, 2H), 2.0928-2.0688 (d, 3H, J=9.6 Hz), 1.8697-1.7952 (m, 2H), 0.9855-0.9329 (m, 3H);

[0107] ESI-MS m/z=356.1, [M+H].sup.+.

EXAMPLE 4

Synthesis of Compound N4

[0108] ##STR00021##

[0109] Synthesis of 1-bromoethyl propionate: 5.0 mg of ZnCl.sub.2 (0.005 g, 0.04 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then 40 mL of anhydrous dichloromethane and propionyl bromide (2.0 g, 14.60 mmol) were added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. 0.67 mL of paraldehyde (0.66 g, 4.99 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h, 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (1.5 g, crude), namely 1-bromoethyl propionate, which was used directly in the next reaction step without further purification;

[0110] Synthesis of compound N4: ketorolac (0.5 g, 1.96 mmol) and KHCO.sub.3 (0.314 g, 3.14 mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 0.7 g of fresh-synthesized 1-bromoethyl propionate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was kept at room temperature under constant stirring for 1-5 h; after the reaction was completed, 10 mL of water and 40 ml of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=7:1) to give compound. N4 (0.52 g, yield: 75%);

[0111] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8211-7.8028 (d, 2H, J=7.3 Hz), 7.5452-7.5090 (t, 1H, J=7.3 Hs), 7.4665-7.4293 (t, 2H, J=7.6 Hz), 6.9381-6.8975 (q, 1H, J=5.4 Hz), 6.8195-6.8098 (d, 1H, J=4.0 Hz), 6.1031-6.0842 (t, 1H, J=3.8 Hz), 4.6117-4.5388 (m, 1H), 4.4745-4.3959 (m, 1H), 4.0846-4.0500 (t, 1H, J=7.7 Hz), 2.9828-2.8764 (m, 1H), 2.8428-2.7521 (m, 1H), 2.3893-2.3105 (m, 2H), 1.5241-1.5037 (m, 3H), 1.1681-1.1076 (q, 3H, J=7.6 Hz);

[0112] ESI-MS m/z=356.1, [M+H].sup.+.

EXAMPLE 5

Synthesis of Compound N5

[0113] ##STR00022##

[0114] Synthesis of 1-bromoisobutyl acetate: 20.0 mg of ZnCl.sub.2 (0.02. g, 0.15 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then 40 mL of anhydrous dichloromethane and acetyl bromide (4.0 g, 29.20 mmol) were added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. Isobutyraldehyde (2.59 g, 35.92 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h, 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (4.4 g, crude), namely 1-bromoisobutyl acetate, which was used directly in the next reaction step without further purification;

[0115] Synthesis of compound N5: ketorolac (2.0 g, 7.83 mmol) and 2.5 mL of triethylamine (1.82 g, 17.99 mmol) were weighed and added to a dry single-necked reaction flask. 8 mL of acetone was added at room temperature under constant stirring, 3.48 g of fresh-synthesized 1-bromoisobutyl acetate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was kept at room temperature under constant stirring for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=8:1) to give compound N5 (2.29 g, yield: 79.5%);

[0116] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8238-7.8058 (d, 2H, J=7.2 Hz), 7.5490-7.5126 (m, 1H), 7.4686-7.4315 (t, 2H, J=7.0 Hz), 6.8247-6.8153 (d, 1H, J=3.8 Hz), 6.6818-6.6696 (d, 1H, J=4.9 Hz), 6.1166-6.0877 (m, 1H), 4.6042-4.5389 (m, 1H), 4.4873-4.4215 (m, 4.1469-4.0717 (m, 1H), 3.0078-2.7502 (m, 2H), 2.1007-2.0262 (m, 4H), 0.9918-0.9470 (m, 6H);

[0117] ESI-MS m/z=370.1, [M+H].sup.+.

EXAMPLE 6

Synthesis of Compound N6

[0118] ##STR00023##

[0119] Synthesis of 1-chloroethyl isobutyrate: ZnCl.sub.2 (0.01 g, 0.07 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then isobutyryl chloride (4.0 g, 37.54 mmol) was added to the reaction flask, the reaction was placed in an ice-water bath at 0° C. under constant stirring, isobutyraldehyde (2.59 g, 35.92 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at 80° C. and reacted for 1 h. The reaction solution was cooled to room temperature, 10 mL of water and 10 mL of dichloromethane were added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (2.4 g, crude), namely 1-chloroethyl isobutyrate, which was used directly in the next reaction step without further purification;

[0120] Synthesis of compound N6: ketorolac (1.9 g, 7.44 mmol) and triethylamine (1.46 g, 14.43 mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 2.4 g of fresh-synthesized 1-bromoisobutyl acetate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was kept at room temperature under constant stirring for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=8:1) to give compound N6 (1.4 g, yield: 51%);

[0121] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.7493-7.7306 (d, 2H, J=7.5 Hz), 7.4749-7.4383 (t, 1H, J=7.4 Hz), 7.3958-7.3585 (t, 2H, J=7.6 Hz), 6.8573-6.8071 (m, 1H), 6.7468-6.7371 (d, 1H, J=3.9 Hz), 6.0294-6.0092 (t, 1H, J=4.0 Hz), 4.5355-4.4694 (m, 1H), 4.4069-4.3270 (m, 1H), 4.0109-3.9742 (t, 1H, J=7.5 Hz), 2.8969-2.8076 (m, 1H), 2.7704-2.6811 (m, 1H), 2.5181-2.4301 (m, 1H), 1.4535-1.4342(m, 3H), 1.1105-1.0656 (m, 6H);

[0122] ESI-MS m/z=370.1, [M+H].sup.+.

EXAMPLE 7

Synthesis of Compound N7

[0123] ##STR00024##

[0124] Synthesis of 1-chloroethyl pivalate: ZnCl.sub.2 (4.0 g, 0.03 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then pivaloyl chloride (2.0 g, 16.59 mmol) was added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. Paraldehyde (0.75 g, 5,67 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at 80° C. and reacted for 1 h. The reaction solution was cooled to room temperature. 10 mL of water and 10 mL of dichloromethane were added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (2.19 g, crude), namely 1-chloroethyl pivalate, which was used directly in the next reaction step without further purification;

[0125] Synthesis of compound N7: ketorolac (1.0 g, 3.92 mmol) and triethylamine (0.63 g, 6.26 mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 1.7 g of fresh-synthesized 1-chloroethyl pivalate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was performed at 40° C. for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was then washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=8:1) to give compound N7 (0.482 g, yield: 32%);

[0126] .sup.1NMR (400 MHz, CDCl.sub.3) δ 7.8221-7.8024 (d, 2H, J=7.9 Hz), 7.5482-7.5128 (t, 1H, J=7.6 Hz), 7.4684-7.4312 (m, 2H), 6.9173-6.8578 (m, 1H), 6.8194-6.8104 (m, 1H), 6.0970-6.0804 (m, 1H), 4.5839-4.4044 (m, 2H), 4.0830-4.0468 (m, 1 H), 2.9648-2.7499 (m, 2H), 1.5237-1.5030 (m, 3H), 1.2032-1.1734 (m, 9H);

[0127] EST-MS m/z=384.1, [M+H].sup.+.

EXAMPLE 8

Synthesis of Compound N8

[0128] ##STR00025##

[0129] Synthesis of 1-bromopropyl propionate: ZnCl.sub.2 (0.01 g, 0.07 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then 15 mL of anhydrous dichloromethane and propionyl bromide (3.0 g, 21,90 mmol) were added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. Propionaldehyde (1.39 g, 23.93 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at room temperature for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a black brown oil (2.1 g, crude), namely 1-bromopropyl propionate, which was used directly in the next reaction step without further purification;

[0130] Synthesis of compound N8: ketorolac (1.0 g, 3.92 mmol) and triethylamine (0.99 g, 9.78 mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 1.7 g of fresh-synthesized 1-bromopropyl propionate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was kept at room temperature under constant stirring for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=8:1) to give compound N8 (1:1 g, yield: 76%);

[0131] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8188-7.8001 (d, 2H, J=7.5 Hz), 7.5478-7.5047 (m, 1H), 7.4654-7.4284 (m, 2H), 6.8169-6.7859 (m, 2H), 6.1063-6.0798 (m, 1H), 4.6069-4.5336 (m, 1H), 4.4789-4.4010 (m, 1H), 4.1082-40599 (m, 1H), 2.9930-2.7472 (m, 211), 2.3965-2.3141 (m, 2H), 1.8693-1.7968 (m, 2H), 1.1687-1.1040 (m, 3H), 0.9832-0.9367 (m, 3H);

[0132] EST-MS m/z=370.2, [M+H].sup.+.

EXAMPLE 9

Synthesis of Compound N8(S)

[0133] ##STR00026##

[0134] The procedure was the same as in Example 8, except that ketorolac was replaced with S-ketorolac;

[0135] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8215-7.8035 (d, 2H, J=7.2 Hz), 7.5503-7.5070 (m, 1H), 7.4678-7.4308 (m, 2H), 6.7476-6.7165 (m, 2H), 6.1055-6.0815 (m, 1H), 4.5958-4.4552 (m, 1H), 4.4506-4.4043 (m, 1H), 4.1476-4.0670 (m, 1H), 2.9951-2.7501 (m, 2H), 2.3978-2.3156 (m, 2H), 1.8719-1.7990 (m, 2H), 1.1718-1.1073(m, 3H), 0.9859-0.9350 (m, 3H);

[0136] EST-MS m/z=370.2, [M+H].sup.+.

EXAMPLE 10

Synthesis of Compound N9

[0137] ##STR00027##

[0138] Synthesis of 1-bromoisobutyl propionate: ZnCl.sub.2 (0.006 g, 0.004 mmol) was weighed and added to a dry two-necked reaction flask, the reaction flask was purged with N.sub.2 for 2 times, then 20 mL of anhydrous dichloromethane and propionyl bromide (3.0 g, 21.90 mmol) were added to the reaction flask, and the reaction was placed in an ice-water bath at 0° C. under constant stirring. Isobutyraldehyde (1.74 g, 24.13 mmol) was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil (3.0 g, crude), namely 1-bromoisobutyl propionate, which was used directly in the next reaction step without further purification;

[0139] Synthesis of compound N9: ketorolac (1.5 g, 5.88 mmol) and triethylamine (1.49 g, 14.72. mmol) were weighed and added to a dry single-necked reaction flask, 8 mL of acetone was added at room temperature under constant stirring, 2.68 g of fresh-synthesized 1-bromoisobutyl propionate crude product was added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was heated to 40° C. and performed for 1-5 h; after the reaction was completed, 10 mL of water and 40 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, and the organic layer was then washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a light yellow oil, which was subjected to flash column chromatography (wet loading, PE/EA=6:1) to give compound N9 (1.64 g, yield: 73%);

[0140] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8173-7.7966 (m, 2H), 7.5441-7.5075 (t, 1H, J=7.4 Hz), 7.4648-7.4275 (t, 2H, J=7.6 Hz), 6.8175-6.8076 (d, 1H, J=4.0 Hz), 6.6932-6.6808 (d, 1H, J=5.0 Hz), 6.1109-6.0776(dd, 1H, J=4.0,9.4 Hz), 4.5953-4.5291 (m, 1H), 4.4845-4.4116 (m, 1H), 4.1257-4.0639 (m, 1H), 3.0003-2.7456 (m, 2H), 2.3990-2.3134 (m, 2H), 2.0989-2.0082 (m, 1H), 1.1695-1.1016 (m, 3H), 0.9854-0.9436 (m, 6H);

[0141] ESI-MS m/z=384.1, [M+H].sup.+.

EXAMPLE 11

Synthesis of Compound N10

[0142] ##STR00028##

[0143] Ketorolac (1.0 g, 3,92 mmol) was weighed into a dry two-necked reaction flask at room temperature, and 3.0 mL of DMSO was added and stirred to dissolve ketorolac. KF (0.5 g, 8.61 mmol) was weighed and added to the reaction flask described above, the reaction flask was purged with Ar for 2 times, 1-chloroethyl cyclohexanyl carbonate (0.83 g, 4.02 mmol) was weighed and added dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction flask was placed at 35° C. and reacted overnight. 20 mL of water and 30 mL of ethyl acetate were added to the reaction flask, followed by liquid separation, the EA layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated NaCl aqueous solution, dried over anhydrous Na.sub.2SO.sub.4, and concentrated, and the residue was subjected to column chromatography (wet loading, PE/EA=6:1) to give a light yellow oil (0.99 g, yield: 67%);

[0144] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8183-7.7989 (d, 2H, J=7.8 Hz), 7.5461-7.5096 (t, 1H, J=7.3 Hz), 7.4662-7.4288 (t, 2H, J=7.6 Hz), 6.8315-6.7939 (m, 2H), 6.6932-6.6808 (d, 1H, J=5.0 Hz), 6.1129-6.0969 (m, 1H), 4.6776-4.5399 (m, 2H), 4.4781-4.4017 (m, 1H), 4.1064-4.0606 (m, 1H), 2.9980-2.8994 (m, 1H), 2.8512-2.7524 (m, 1H), 1.9165 (s, 2H), 1.7489-1.7393 (m, 1H), 1.5653-1.3194 (m, 9H);

[0145] ESI-MS m/z=426.1, [M+H].sup.+.

EXAMPLE 12

Synthesis of Compound N12

[0146] ##STR00029##

[0147] Ketorolac (2.0 g, 7.83 mmol) and DBU (2.38 g, 15.63 mmol) were added to a 50 mL dry single-necked reaction flask at room temperature, 10 mL of acetone was added and stirred to dissolve ketorolac, then 1-chloroethyl ethyl carbonate (1.79 g, 11.73 mmol) was weighed and added to the reaction flask described above, and the reaction was heated to 40+ C. and performed for 2 h. KI (1.3 g, 7.83 mmol) and TBAB (0.51 g, 1.58 mmol) were weighed and added to the reaction flask, and the reaction was continued under stirring at 40° C. overnight. Water (10 mL) and ethyl acetate (30 mL) were added to the reaction flask, followed by liquid separation, the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give the target product (1.90 g, yield: 65.3%);

[0148] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.83-7.79 (m, 2H), 7.55-7.51 (m, 1H), 7.47-7.43 (m, 2H), 6.87-6.79 (m, 2H), 6.11 (d, J=4.0 Hz, 1H), 4.62-4.53 (m, 1H), 4.48-4.40 (m, 1H), 4.29-4.17 (m, 2H), 4.14-4.06 (m, 1H), 3.01-2.89 (m, 1H), 2.86-2.75 (m, 1H), 1.56 (dd, J=2.8, 5.6 Hz, 3H), 1.35-1.28 (m, 3H).

[0149] ESI-MS m/z=372.1, [M+H].sup.+.

EXAMPLE 13

Synthesis of Compound N12(S)

[0150] ##STR00030##

[0151] The procedure was the same as in Example 12, except that ketorolac was replaced with S-ketorolac;

[0152] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.83-7.79 (m, 2H), 7.55-7.51 (m, 1H), 7.47-7.43 (m, 2H), 6.87-6.79 (m, 2H), 6.11 (d, J=4.0 Hz, 1H), 4.62-4.53 (m, 1H), 4.48-4.40 (m, 1H), 4.29-4.17 (m, 2H), 4.14-4.06 (m, 1H), 3.01-2.89 (m, 1H), 2.86-2.75 (m, 1H), 1.56 (dd, J=2.8, 5.6 Hz, 3H), 1.35-1.28 (m, 3H).

[0153] ESI-MS m/z=372.1, [M+H].sup.+.

EXAMPLE 14

Synthesis of Compound N13

[0154] ##STR00031##

[0155] Synthesis of 1-chloroethyl methyl carbonate: 1-chloroethyl chloroformate (2.0 g) was weighed in a 50 mL dry two-necked reaction flask under N.sub.2 atmosphere, anhydrous dichloromethane was added, the reaction flask was placed in an ice bath under stirring, methanol (0.67 g, 1.5 eq) was weighed in the reaction flask, then pyridine Py (1.33 g, 1.2 eq) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. A small amount of dichloromethane and water were supplemented to the reaction flask, followed by liquid separation, and the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was about 3, and then washed with water until it was neutral, and the dichloromethane was dried over anhydrous sodium sulfate and concentrated under reduced pressure to give 1-chloroethyl methyl carbonate (0.665 g).

[0156] Synthesis of compound N13: ketorolac (0.73 g, 1.0 eq) was weighed in a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.88 g, 2.0 eq) and the fresh-prepared 1-chloroethyl methyl carbonate (0.66 g, 1.5 eq) were added, the reaction was performed at 40° C. for 1 h, KI (1.0 eq) and TBAB (0.2 eq) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.61 g, yield: 61%).

[0157] .sup.1NMR (400 MHz, CDCl.sub.3) δ 7.84-7.80 (m, 2H), 7.59-7.53(m, 1H), 7.50-7.46(m, 2H), 6.91-6.82(m, 2H), 6.13 (d, J=4.2 Hz, 1H), 4.62-4.53(m, 1H), 4.48-4.40 (m, 1H), 4.29-4.17 (d, J=7.1 Hz, 3H), 4.14-4.06 (m, 1H), 3.01-2.89 (m, 1H), 2.86-2.75 (m, 1H), 1.57 (dd, J=2.8, 5.6 Hz, 3H).

[0158] EST-MS m/z=358.2, [M+H].sup.+.

EXAMPLE 15

Synthesis of Compound N14

[0159] ##STR00032##

[0160] Synthesis of 1-chloropropyl chloroformate: triphosgene (10.00 g, 33.70 mmol) was weighed to a 100 mL three-necked reaction flask. 15 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring. Py (0.54 g, 6.83 mmol) was weighed and added with 5 mL of dichloromethane for dilution, and added to the reaction flask. Then n-propionaldehyde (4.6 g, 79.20 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (3.91 g, yield: 73.2%).

[0161] Synthesis of 1-chloropropyl methyl carbonate: 1-chloropropyl chloroformate (1.00 g, 6.38 mmol) was weighed in a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, methanol (0.30 g, 9.50 mmol) was weighed and added to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stiffing, Py (0.63 g, 7.96 mmol) was weighed and added slowly and dropwise to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h, 10 mL of water was added to the reaction flask, followed by liquid separation, and the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.705 g), which was used directly in the next reaction step without further purification;

[0162] Synthesis of compound N14: ketorolac (0.73 g, 2.86 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.88 g, 5.78 mmol) and 0.66 g of fresh-prepared 1-chloropropyl methyl carbonate were added, the reaction was performed at 40° C. for 1 h, KI (0.48 g, 2.90 mmol) and TBAB (0.19 g, 0.58 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.64 g, yield: 58.1%).

[0163] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.83-7.80 (m, 2H), 7.49-7.44 (m, 2H), 6.87-6.79 (m, 2H), 6.82 (d, J=3.9 Hz, 1H), 6.12-6.10 (m, 1H), 4.67-4.42 (m, 2H), 4.23 (d, J=6.5 Hz, 3H), 4.14-4.02 (m, 1H), 3.04-2.76 (m, 2H), 1.96-1.82 (m, 2H), 1.04-0.96 (m, 3H).

[0164] ESI-MS m/z=372.1, [M+H].sup.+.

EXAMPLE 16

Synthesis of Compound N15

[0165] ##STR00033##

[0166] Synthesis of 1-chloropropyl chloroformate: triphosgene (10.00 g, 33.70 mmol) was weighed to a 100 mL three-necked reaction flask. 15 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring. Py (0.54 g, 6.83 mmol) was weighed and added with 5 mL of dichloromethane for dilution, and added to the reaction flask. Then n-propionaldehyde (4.6 g, 79.20 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (3.91 g, yield: 73.2%),

[0167] Synthesis of 1-chloropropyl ethyl carbonate: 1-chloropropyl chloroformate (1.0 g, 6.38 mmol) was weighed to a thy two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, ethanol (0.44 g. 9.55 mmol) was weighed and added to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (0.63 g, 7.96 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.766 g), which was used directly in the next reaction step without further purification; Synthesis of compound NIS: ketorolac (0.73 g, 2.86 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DEW (0.88 g, 5.78 mmol) and 0.78 g of the fresh-prepared 1-chloropropyl ethyl carbonate were added, the reaction was performed at 40° C., for 1 h, KI (0.48 g, 2.90 mmol) and. TBAB (0.19 g, 0.58 mmol) were added, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.66 g, yield: 59.88%).

[0168] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8174-7.7961 (m, 2H), 7.4658-7.4288 (m, 2H), 6.87-6.79 (m, 2H), 6.81 (d, J=3.9 Hz, 1H), 6.1138-6.0967 (m, 1H), 4.6115-4.4063 (m, 2H), 4.2648-4.1697 (m, 2H), 4.1276-4.0759 (m, 1H), 3.0117-2.7529 (m, 2H), 1.9097-1.8045 (m, 2H), 1.3463-1.2380 (m, 3H), 1.0103-0.9594 (m, 3H).

[0169] ESI-MS m/z=385.2, [M+H].sup.+.

EXAMPLE 17

Synthesis of Compound N15(S)

[0170] ##STR00034##

[0171] The procedure was the same as in Example 16, except that ketorolac was replaced with S-ketorolac;

[0172] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8174-7.7961 (m, 2H), 7.4658-7.4288 (m, 2H), 6.87-6.79 (m, 2H), 6.81 (d, J=3.9 Hz, 1H), 6.1138-6.0967 (m, 1H), 4.6115-4.4063 (m, 2H), 4.2648-4.1697 (m, 2H), 4.1276-4.0759(m, 1H), 3.0117-2.7529 (m, 2H), 1.9097-1.8045 (m, 2H), 1.3463-1.2380 (m, 3H), 1.0103-0.9594 (m, 3H).

[0173] ESI-MS m/z=385.2, [M+H].sup.+.

EXAMPLE 18

Synthesis of Compound N16

[0174] ##STR00035##

[0175] Synthesis of 1-chloropropyl chloroformate: triphosgene (10.00 g, 33.70 mmol) was weighed to a 100 mL three-necked reaction flask, 15 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring. Py (0.54 g, 6.83 mmol) was weighed and added with 5 mL of dichloromethane for dilution, and added to the reaction flask. Then n-propionaldehyde (4.6 g, 79.20 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (3.91 g, yield: 73.2%).

[0176] Synthesis of 1-chloropropyl isopropyl carbonate: 1-chloropropyl chloroformate (1.0 g, 6.38 mmol) was weighed to a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, isopropanol (0.58 g, 9.60 mmol) was weighed and added to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (0.63 g, 7.94 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.781 g), which was used directly in the next reaction step without further purification;

[0177] Synthesis of compound N16: ketorolac (0.73 g, 2.86 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.88 g, 5.78 mmol) and 0.72 g of the fresh-prepared 1-chloropropyl isopropyl carbonate were added, the reaction was performed at 40° C. for 1 h, KI (0.48 g, 2.90 mmol) and TBAB (0.19 g, 0.58 mmol) were added, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.61 g, yield: 53.40%).

[0178] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.82-7.79 (m, 2H), 7.55-7.50 (m, 1H), 7.47-7.42 (m, 2H), 6.81 (t, 3.8 Hz, 1H), 6.68 (t, J=5.4 Hz, 1H), 6.12-6.09 (m, 1H), 4.94-4.82 (m, 1H), 4.62-4.53 (m, 1H), 4.49-4.40 (m, 1H), 4.12-4.07 (m, 1H), 3.01-2.89 (m, 1H), 2.87-2.75 (m, 1H), 1.91-1.83 (m, 2H); 1.33-1.27 (m, 6H), 1.01-0.95 (m, 3H).

[0179] ESI-MS m/z=400.2, [M+H].sup.+.

EXAMPLE 19

Synthesis of Compound N16(S)

[0180] ##STR00036##

[0181] The procedure was the same as in Example 18, except that ketorolac was replaced with S-ketorolac;

[0182] .sup.1 NMR (400 MHz, CDCl.sub.3) δ 7.82-7.79 (m, 2H), 7.55-7.50 (m, 1H), 7.47-7.42 (m, 2H), 6.81 (t, J=3.8 Hz, 1H), 6.68 (t, J=5.4 Hz, 1H), 6.12-6.09 (m, 1H), 4.94-4.82 (m, 1H), 4.62-4.53 (m, 1H), 4.49-4.40 (m, 1H), 4.12-4.07 (m, 1H), 3.01-2.89 (m, 1H), 2.87-2.75 (m, 1H), 1.91-1.83 (m, 2H); 1.33-1.27 (m, 6H), 1.01-0.95 (m, 3H).

[0183] EST-MS m/z=400.2, [M+H].sup.+.

EXAMPLE 20

Synthesis of Compound N17

[0184] ##STR00037##

[0185] Synthesis oft-chloroisobutyl chloroformate: triphosgene (16.00 g, 53.92 mmol) was weighed to a 100 MI.sub.— three-necked reaction flask, 30 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a −20° C. cold trap under constant stirring. Py (0.872 g, 11.02 mmol) was weighed and added with 4 mL of dichloromethane for dilution, and added to the reaction flask. Then n-propionaldehyde (7.44 g, 128.1 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (7.96 g, yield: 36.5%);

[0186] Synthesis of 1-chloroisobutyl methyl carbonate: 1-chloroisobutyl chloroformate (2.00 g, 11.7 mmol) was weighed to a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, methanol (0.57 g, 17.84 mmol) was weighed and added to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (1.12 g, 14.16 mmol) was weighed and added slowly and dropwise to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (1.205 g), which was used directly in the next reaction step without further purification;

[0187] Synthesis of compound N17: with reference to the above, ketorolac (0.792 g, 3.10 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.96 g, 6.3 mmol) and the fresh-prepared 1-chloropropyl methyl carbonate (0.775 g, 4.67mmol) were added, the reaction was performed at 40° C. for 1 h, KI (0.516 g, 3.13 mmol) and TBAB (0.204 g, 0.624 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.703 g, yield: 58.75%).

[0188] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.82-7.78 (m, 2H), 7.55-7.51 (m, 1H), 7.47-7.43 (m, 2H), 6.82-6.80 (m, 1H), 6.57 (dd, J=3.6, 4.9 Hz, 1H), 6.12-6.09 (m, 1H), 4.61-4.53 (m, 1H), 4.49-4.41 (m, 1H), 4.21 (d, J=6.4 Hz, 3H), 4.13-4.08 (m, 1H), 3.03-2.75 (m, 2H), 2.13-2.04 (m, 1H), 1.02-0.96 (m, 6H).

[0189] ESI-MS m/z=386.2, [M+H].sup.+.

EXAMPLE 21

Synthesis of Compound N18

[0190] ##STR00038##

[0191] Synthesis of 1-chloroisobutyl chloroformate: triphosgene (20.00 g, 67.40 mmol) was weighed to a 100 mL three-necked reaction flask, 35 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring. Py (1.09 g, 13.78 mmol) was weighed, diluted with 5 mL of dichloromethane, and added to the reaction flask. Then n-propionaldehyde (9.30 g, 160.12 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (7.64 g, yield: 71.5%); Synthesis of 1-chloroisobutyl ethyl carbonate: 1-chloroisobutyl chloroformate (1.00 g and 5.85 mmol) was weighed to a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, ethanol (0.29 g and 8.92 mmol) was weighed to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (0.56 g and 7.08 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.695 g), which was used directly in the next reaction step without further purification;

[0192] Synthesis of compound N18: with reference to the above, ketorolac (0.66 g, 2.59 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.8 g, 5.25 mmol) and 0.67 g of the fresh-prepared 1-chloroisobutyl ethyl carbonate were added, the reaction was performed at 40° C. for 1 h, KI (0.43 g, 2.61 mmol) and TBAB (0.17 g, 0.52 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h, Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0,63 g, yield: 55.15%).

[0193] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.82-7.78 (m, 2H), 7.55-7.51 (m, 1H), 7.47-7.43 (m, 2H), 6.82-6.80 (m, 1H), 6.57 (dd, J=3.6, 4.9 Hz, 1H), 6.12-6.09 (m, 1H), 4.61-4.53 (m, 1H), 4.49-4.41 (m, 1H), 4.27-4.14 (m, 2H), 4.13-4.08 (m, 1H), 3.03-2.75 (m, 2H), 2.13-2.04 (m, 1H), 1.35-1.25 (m, 3H), 1.02-0.96 (m, 6H).

[0194] ESI-MS m/z=400.2, [M+H].sup.+.

EXAMPLE 22

Synthesis of Compound N19

[0195] ##STR00039##

[0196] Synthesis of 1-chloroisobutyl chloroformate: triphosgene (20.00 g, 67.40 mmol) was weighed to a 100 mL three-necked reaction flask, 35 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −2° C. under constant stirring. Py (1.09 g, 13.78 mmol) was weighed, diluted with 5 mL of dichloromethane, and added to the reaction flask. Then n-propionaldehyde (9.30 g, 160.12 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (7.64 g, yield: 71.5%);

[0197] Synthesis of 1-chloroisobutyl isopropyl carbonate: 1-chloroisobutyl chloroformate (1.00 g, 5.85 mmol) was weighed to a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, isopropanol (0.53 g, 8.78 mmol) was weighed and added to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (0.57 g, 7.21 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.755 g), which was used directly in the next reaction step without further purification;

[0198] Synthesis of compound N19: ketorolac (0.66 g, 2.59 mmol) was weighed to a dry single-necked reaction flask, 10 mL of acetone was added and stirred to dissolve ketorolac, DIRT (0.80 g, 5.25 mmol) and 0.65 g of the fresh-prepared 1-chloroisobutyl isopropyl carbonate were added, the reaction was performed at 40° C. for 1 h, KI (0.43 g, 2.61 mmol) and TB ABB (0.17 g, 0.52 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h, Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/FA=8:1) to give a colorless oil (0.56 g, yield: 47.36%).

[0199] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.82-7.79 (m, 2H), 7.55-7.50 (m, 1H), 7.47-7.42 (m, 2H), 6.81 (t, J=4.0 Hz, 1H), 6.56 (dd, J=5.0, 2.6 Hz, 1H), 6.13-6.09 (m, 1H), 4.94-4.82 (m, 1H), 4.61-4.53 (m, 1H), 4.49-4.41 (m, 1H), 4.13-4.08 (m, 1H), 3.03-2.75 (an, 2H), 2.14-2.05 (m, 1H), 1.33-1.27 (m, 6H), 1.02-0.96 (m, 6H);

[0200] ESI-MS m/z=414.3, [M+H].sup.+.

EXAMPLE 23

Synthesis of Compound N20

[0201] ##STR00040##

[0202] Synthesis of 1-chloropropyl chloroformate: triphosgene (5.00 g, 16.85 mmol) was weighed to a 100 mL three-necked reaction flask, 10 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring, Py (0.27 mg, 3.41 mg) was weighed, diluted with 5 mL of dichloromethane, and added to the reaction flask. Then n-propionaldehyde (2.3 g, 39.60 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (2.01 g, yield: 75.3%);

[0203] Synthesis of 1-chloropropyl cyclohexyl carbonate: 1-chloropropyll chloroformate (1.882 g, 12.0 mmol) was weighed to a dry two-necked reaction flask, 10 mL of anhydrous dichloromethane was added under constant stirring, cyclohexanol (1.820 g, 18.0 mmol.) was weighed to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (1.259 g, 14.76 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a.

[0204] colorless oil (2.702 g), which was used directly in the next reaction step without further purification;

[0205] Synthesis of compound N20: ketorolac (0.872 g, 3.41 mmol) was weighed to a dry single-necked reaction flask, 5 mL of acetone was added and stirred to dissolve ketorolac, (1.037 g, 6.82 mmol) and the fresh-prepared 1-chloropropyl cyclohexyl carbonate (1.354 g, 6.06 mmol) were added, the reaction was performed at 40° C. for 1 h, KI (0.592 g, 3.41 mmol) and TBAB (0.235 g, 0.68 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.98 g, yield: 65.3%).

[0206] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.82-7.79 (m, 2H), 7.55-7.50 (m, 1H), 7.47-7.42 (m, 2H), 6.80 (t, J=4.6 Hz, 1H), 6.08 (t, J=5.4 Hz, 1H), 6.12-6.09 (m, 1H), 4.67-4.53 (m, 2H), 4.48-4.41 (m, 1H), 4.15-4.07 (m, 1H), 3.01-2.89 (m, 1H), 2.86-2.74 (m, 1H), 1.93-1.84 (m, 4H), 1.77-1.72 (m, 2H), 1.57-1.43 (m, 3H), 1.41-1.30 (m, 3H), 1.01-0.95 (m, 3H).

[0207] ESI-MS m/z=440.2, [M+H].sup.+.

EXAMPLE 24

Synthesis of Compound N21

[0208] ##STR00041##

[0209] Synthesis of 1-chloroisobutyl chloroformate: triphosgene (10.00 g, 38.70 mmol) was weighed to a 50 mL three-necked reaction flask, 25 mL of anhydrous dichloromethane was added, the reaction flask was purged with Ar gas for 3 times, and the reaction flask was placed to a cold trap at −20° C. under constant stirring. Py (0.55 mg, 6.95 mmol) was weighed, diluted with 5 mL of dichloromethane, and added to the reaction flask. Then n-propionaldehyde (4.7 g, 80.92 mmol) was weighed and added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the temperature of the cold trap was set at −2° C., and the reaction was continued for 20 h. The reaction flask containing KOH aqueous solution was pumped to a water pump for 5 min before being removed from the cold trap, concentrated under reduced pressure to remove dichloromethane, and then distilled to give a colorless to light yellow oil (3.82 g, 71.5%);

[0210] Synthesis of 1-chloroisobutyl cyclohexyl carbonate: 1-chloroisobutyl chloroformate (1.0 g, 5.88 mmol) was weighed to a dry two-necked reaction flask. 10 mL of anhydrous dichloromethane was added under constant stirring, cyclohexanol (0.883 g, 8.82 mmol) was weighed to the reaction flask described above, the reaction flask was placed in an ice-water bath under constant stirring, pyridine (0.558 g, 7.05 mmol) was weighed and added slowly to the reaction flask described above, a white solid produced during the dropwise addition process, and after the dropwise addition was completed, the reaction flask was placed at room temperature and reacted for 1 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% KHSO.sub.4 until pH was 3-4, then washed with water until it was nearly neutral, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a colorless oil (0.86 g), which was used directly in the next reaction step without further purification;

[0211] Synthesis of compound N21: ketorolac (0.5 g, 1.96 mmol) was weighed to a dry single-necked reaction flask, 5 mL of acetone was added and stirred to dissolve ketorolac, DBU (0.45 g, 3.41 mmol) and the fresh-prepared 1-chloroisobutyl cyclohexyl carbonate (0.798 g, 3.41 mmol) were added, the reaction was performed at 40° C. for 1 h, KI (0.325 g, 1.96 mmol) and TBAB (0.126 g, 0.39 mmol) were supplemented, and the reaction solution was kept warm and reacted for 2-6 h.

[0212] Dichloromethane and water were added to the reaction, followed by liquid separation, and the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=8:1) to give a colorless oil (0.51 g, yield: 58.5%).

[0213] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.83-7.79 (m, 2H), 7.54-7.9 (m, 1H), 7.47-7.41 (m, 2H), 6.84-6.78 (m, 1H), 6.10 (t, J=5.4 Hz, 1H), 6.12-6.10 (m, 1H), 4.68-4.52 (m, 2H), 4.48-4.42 (m, 1H), 4.16-4.05 (m, 1H), 3.03-2.91 (m, 1H), 2.88-2.75 (m, 1H), 2.06-1.88 (m, 3H), 1.79-1.71 (m, 2H), 1.58-1.42 (m, 3H), 1.44-1.32 (m, 3H), 1.03-0.93 (m, 6H).

[0214] EST-MS m/z=454.4, [M+H].sup.+.

EXAMPLE 25

Synthesis of Compound N22

[0215] ##STR00042##

[0216] Synthesis of ketorolac chloride: ketorolac (1.0 g, 3.92 mmol) was weighed to a 50 mL pre-dried two-necked reaction flask, 10 mL of anhydrous dichloromethane was added, the reaction flask was purged with N.sub.2 for 2 times under constant stirring, the reaction flask was placed in the ice bath under constant stirring, 5 drops of DMF were added, then oxalyl chloride (0.746 g, 5.88 mmol) was added slowly and dropwise to the reaction flask, and after the dropwise addition was completed, the reaction solution was kept in the ice bath and reacted for 2 h, and concentrated under reduced pressure to remove the solvent to give a yellow oil (0.92 g), which was used directly in the next reaction step without further purification;

[0217] Synthesis of 1-chloroethyl ketorolac ester: The fresh-prepared ketorolac chloride (0.92 g, 3.37 mmol) was placed in a 50 mL two-necked reaction flask under N.sub.2 atmosphere, and anhydrous ZnCl.sub.2 (46 mg, 0.337 mmol) was added to the reaction flask. Anhydrous toluene (20 ml) was then weighed and added to the reaction flask, and the reaction flask was placed in an ice bath under constant stirring. After paraldehyde (147 mg, 1.11 mmol) was weighed, diluted with 5 mL of toluene, and added slowly and dropwise to the reaction flask described above, and after the dropwise addition was completed, the reaction was heated to 80° C. and performed for 6 h. 10 mL of water was added to the reaction flask, followed by liquid separation, the dichloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution for 2 times until pH was about 9, then washed with water again and with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give a yellowish-brown oil (0.91 g, crude), namely 1-chloroethyl ketorolac ester, which was used directly in the next reaction step without further purification;

[0218] Synthesis of compound N22: ketorolac (0.5 g, 1.96 mmol) and KHCO.sub.3 (0.3 g, 3.0 mmol) were weighed to a 50 mL single-necked reaction flask, 10 mL of acetone was added under constant stirring, then 1-chloroethyl ketorolac ester (0.93 g, 2.93 mmol) was weighed to the reaction flask, and the reaction was heated to 60° C. and performed for 6 h. Dichloromethane and water were added to the reaction, followed by liquid separation, and the di chloromethane layer was washed with 5% NaHCO.sub.3 aqueous solution, washed with water and saturated brine, dried, and concentrated, and the residue was subjected to flash column chromatography (PE/EA=3:1) to give a yellow oil (332.09 mg, yield: 31.6%).

[0219] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8301-7.8106 (m, 4H), 7.5671-7.5201 (m, 2H), 7.4856-7.45276 (m, 4H), 6.9409-6.8896 (m, 2H), 6.8448-6.8250 (m, 1H), 6.1611-6.1.1026 (m, 2H), 4.6335-4.5599 (m, 2H), 4.4835-4.4213 (m, 2H), 4.0994-4.0534 (m, 2H), 2.9910-2.8786 (m, 2H), 2.8511-2.7639 (m, 2H), 1.5349 (q, 3H, J=2.7 Hz);

[0220] ESI-MS m/z=537.2, [M+H].sup.+.

EXAMPLE 26

Synthesis of Compound N26

[0221] ##STR00043##

[0222] Synthesis of M01: n-octanol (29.1 g, 0.223 mol) and 1-chloroethyl chloroformate (40.0 g, 0.280 mol) were weighed to a reaction flask, and dissolved in dichloromethane (300 mL) and placed in an ice bath. Triethylamine (34.0 g, 0.336 mol) was diluted with dichloromethane (50 mL) and added dropwise to the reaction flask in an ice bath over about 1 h. After the dropwise addition was completed, the ice bath was removed, and the reaction was performed at room temperature overnight. The next day, the reaction solution was subjected to suction filtration, and the filter cake was washed with dichloromethane (50 mL×3). The filtrate was washed with 1% citric acid solution (500 mL), water (300 mL) and saturated brine (300 mL), dried over anhydrous sodium sulfate, and concentrated to give M01 (54.83 g, crude), which was used directly in the next step without purification.

[0223] Synthesis of M02: M01 (54.83 g, 0.229 mol), sodium iodide (69.41 g, 0.463 mol), calcium chloride (7.70 g, 0.069 mol) and TBAB (4.47 g, 0.014 mol) were weighed and placed in the reaction flask, and dissolved in ethyl acetate (500 mL). The reaction was heated to 60° C., kept warm and stirred for 3 h. The reaction solution was subjected to suction filtration, and the filter cake was washed with ethyl acetate (50 mL). The filtrate was concentrated, and the concentrate was added with n-hexane (300 mL) and water (200 mL), stirred at room temperature, and subjected to suction filtration, the filtrate was separated, and the organic phase was collected. The organic phase was washed with 10% sodium thiosulfate solution (300 mL), water (200 mL) and saturated brine (200 mL), dried over anhydrous sodium sulfate and concentrated to give 56.51 g of crude product, which was used directly in the next step without purification.

[0224] Synthesis of compound N26: M02 (56.51 g, 0.172 mol) and ketorolac (48.31 g, 0.189 mol) were weighed and placed to the reaction flask, ethyl acetate (500 mL) was added and the dissolution was found to be not completed, and then tetrahydrofuran (100 mL) was added for improving dissolution in an ice bath. Triethylamine (26.11 g, 0.258 mol) was weighed and added dropwise to the reaction flask over about 30 min. The ice bath was removed, and the reaction was performed under stirring at room temperature overnight. The next day, the reaction solution was subjected to suction filtration, and the filter cake was washed with ethyl acetate (50 mL×3). The reaction solution was washed with water (300 mL), the aqueous layer was extracted with ethyl acetate (150 mL×3), and the organic phases were combined, washed with 10% sodium carbonate solution (300 mL), water (300 mL) and saturated brine (300 mL), dried over anhydrous sodium sulfate, and concentrated, and the residue was subjected to flash column chromatography (wet loading, PE/EA=15:1) and concentrated. The concentrate was dissolved in ethyl acetate, and added with activated charcoal (1.35 g), followed by stirring in a water bath at 40° C., and subjected to suction filtration after about 1 h, the filtrate was collected and concentrated to give compound N26 (20.98g, yield: 26.76%);

[0225] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.81-7.79 (m, 2H), 7.55-7.50 (m, 1H), 7.46-7.42 (m, 2H), 6.83-6.80 (m, 2H), 6.11-6.09 (m, 1H), 4.58-4.23 (m, 2H), 4.15-4.06 (m, 3H), 2.95-2.78 (m, 214), 1.61-1.55 (m, 5H), 1.31-1.25 (m, 10H), 0.88-0.85 (m, 3H).

[0226] ESI-MS m/z=494.1 [M+K].sup.+.

EXAMPLE 27

Synthesis of Compound N27

[0227] ##STR00044##

[0228] Synthesis of 1-chloroethyl heptanoate: heptanoyl chloride (1000 g, 0.068 mol) was weighed to a three-necked flask, dissolved in acetonitrile (50 mL), then added with zinc chloride (0.02 g) and 4A molecular sieves (0.50 g), and purged with nitrogen for 3 times in an ice bath. Paraldehyde (3.1 g, 0.023 mol) was added dropwise over 30 min, the reaction solution was placed in a water bath at 60° C. for heating, and the reaction was completed after 3.5 h. The reaction solution was subjected to suction filtration, and the filter cake was washed with ethyl acetate (50 mL×3). The filtrate was concentrated to give 12.63 g of crude product, which was used directly in the next reaction without purification.

[0229] Synthesis of compound N27: ketorolac (8.48 g, 0.033 mol), potassium carbonate (6.82 g, 0.049 mol) and sodium iodide (5.05 g, 0.034 mol) were weighed and placed to a reaction flask, acetone (150 mL) was added and stirred to dissolve the mixture at room temperature. 1-chloroethyl heptanoate (12.63 g, 0.066 mol) was weighed and added dropwise to the reaction flask. After the dropwise addition was completed, the reaction was performed at room temperature overnight. The next day, the reaction solution was subjected to suction filtration, the filtrate was concentrated, and the concentrate was dissolved in ethyl acetate (100 mL). The solution was washed with water (100 mL), 10% sodium bicarbonate solution (100 mL) and saturated brine (100 mL), dried, and concentrated, and the residue was subjected to flash column chromatography (wet loading, PE/EA=15:1) to give compound N27 (4.29 g, yield: 31.59%);

[0230] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8211-7.8028 (d, 2H, 7.3 Hz), 7.5452-7.5090 (t, 1H, J=7.3 Hz), 7.4665-7.4293 (t, 2H, J=7.6 Hz), 6.9381-6.8975 (q, 1H, J=5.4 Hz), 6.8195-6.8098 (d, 1H, J=4.0 Hz), 6.1031-6.0842 (t, 1H, J=3.8 Hz), 4.6117-4.5388 (m, 1H), 4.4745-4.3959 (m, 1H), 4.0846-4.0500 (t, 1H, J=7.7 Hz), 2.9828-2.8764 (m, 1H), 2.8428-2.7521 (m, 1H), 2.3893-2.3105 (m, 2H), 1.5241-1.5037 (m, 5H), 1.2563-1.1918 (m, 6H), 1.1681-1.1076 (q, 3H, J=7.6 Hz);

[0231] ESI-MS m/z=412.5, [M+H].sup.+.

Comparative Example 1

Synthesis of Compound N11

[0232] ##STR00045##

[0233] At room temperature, 1.0 g of ketorolac was weighed to a 50 mL dry reaction flask, 5 mL of isopropanol was added and stirred to dissolve ketorolac, then 0.5 mL of concentrated sulfuric acid was added slowly to the reaction flask, and after the dropwise addition was completed, the reaction was continued at room temperature for 2 h, and water (10 mL) and ethyl acetate (30 mL) were added to the reaction flask, followed by liquid separation, the organic layer was washed with 5% NaHCO.sub.3 aqueous solution, dried over anhydrous sodium sulfate, concentrated and subjected to flash column chromatography (PE/EA=6:1) to give the target product (1.05 g, yield: 91%);

[0234] .sup.1H NMR (400 MHz, CDCl.sub.3) δ 7.8254-7.8014 (m, 2H), 7.5459-7.5024 (m, 1H), 7.4650-7.42.55 (m, 2H), 6.8197-6.8098 (m, 1H), 6.0940-6.0823 (m, 1H), 5.1195-5,0256 (m, 1H), 4.6155-4.5501 (m, 1H), 4.4640-4.3973 (m, 1H), 4.0436-4.0064 (m, 1H), 2.9737-2,8888 (m, 1H), 2.8199-2.7300 (m 1H), 1.2950-1.2641 (t, 6H, J=6.2 Hz);

[0235] The side chain of the ketorolac derivative represented by compound N21 was selected from fatty chains, which was used as a control compound for the compounds of the present disclosure.

Comparative Example 2

[0236] The listed drug flurbiprofen axetil (FPA) was purchased as a control compound for the compounds of the present disclosure.

##STR00046##

Test Example 1: High Temperature Stability Study of Compounds

[0237] Test protocol: the compounds prepared in the present disclosure were placed in a colorless and transparent vial, placed in the dark at a high temperature (60° C.), and were sampled for day 0, day 5 and day 10, respectively, and the purity of the compounds and the change of the related substance (ketorolac) were determined. The results are shown in Table 1:

TABLE-US-00001 TABLE 1 Day 0 Day 5 Day 10 N2 Total main peak purity 95.58 95.21 94.82 (%) Ketorolac (%) 0.03 0.04 0.05 N3 Total main peak purity 92.45 90.83 90.36 (%) Ketorolac (%) 0.11 0.15 0.17 N4 Total main peak purity 98.91 98.38 98.04 (%) Ketorolac (%) 0.12 0.17 0.14 N5 Total main peak purity 97.46 97.62 97.37 (%) Ketorolac (%) 0.14 0.15 0.17 N6 Total main peak purity 91.56 90.94 90.22 (%) Ketorolac (%) 0.14 0.13 0.17 N7 Total main peak purity 90.83 88.66 88.59 (%) Ketorolac (%) 0.18 0.25 0.32 N8 Total main peak purity 93.15 93.30 92.34 (%) Ketorolac (%) 0.18 0.42 0.96 N9 Total main peak purity 96.21 95.58 95.21 (%) Ketorolac (%) 0.29 0.31 0.30 N10 Total main peak purity 96.36 94.28 94.41 (%) Ketorolac (%) 0.05 0.23 0.37 N12 Total main peak purity 93.84 93.59 93.36 (%) Ketorolac (%) 0.03 0.07 0.07 N15 Total main peak purity 96.30 95.87 95.59 (%) Ketorolac (%) 0.08 0.09 0.14 N16 Total main peak purity 97.33 96.50 96.16 (%) Ketorolac (%) 0.05 0.07 0.07 N18 Total main peak purity 94.25 92.10 91.78 (%) Ketorolac (%) 0.06 0.18 0.26 N19 Total main peak purity 96.30 94.61 94.41 (%) Ketorolac (%) 0.07 0.09 0.12

[0238] As can be seen from the test results, the compounds of the present disclosure could all maintain relatively high stability at 60° C.

Test Example 2: Stability Study of Levorotatory Enantiomer of Compounds in Solvent

[0239] 1. Test protocol: the compounds (N2(S), N12(S), N15(S) and N16 (S)) were dissolved in medium-chain triglyceride (MCT), and the resulting samples were kept at 5° C., 25° C. and 60° C. and sampled at day 0, day 5, day 15 and day 30, respectively, and the purity of the compounds, the change of the related substance (ketorolac) and the change in the isomer (dextrorotatory form) were determined.

[0240] 2. Test method: the samples were prepared according to Table 2, wherein each sample was dispensed into 10 vials according to the lofting volume, and the samples were lofted according to Table 3.

TABLE-US-00002 TABLE 2 Investigation of sample formula with solution stability Total Concen- Dosage formu- tration Dosage of sample lation of drug of drug for single Dosage amount substances substances detection of solvent (g) (mg/g) (g) (g) (g) Drug- 12 50 0.6 1 11.4 containing MCT solution

TABLE-US-00003 TABLE 3 Lofting location, investigation condition and time Investigation Instruments and Sampling detection time (d) condition equipment 0 5 15 30 2-8° C., in Analysis ✓ ✓ ✓ ✓ the dark refrigerator 25° C., in Formulation / ✓ ✓ ✓ the dark stability kit 60° C., in Formulation / ✓ ✓ ✓ the dark oven “✓” denotes that the relevant substance and isomer were determined; “/” denotes that they were undeterminable.

[0241] 3. Procedures:

(1) Sample Preparation:

[0242] {circle around (1)} Preparation of drug-containing MCT solution: 6 g of the drug substances of compounds N2(S), N12(S), N15(S) and N16(S) were weighed, respectively, 9 g of MCT was added, and the reaction solution was magnetically stirred for 20 min.

(2) Packaging and Sample Retention:

[0243] {circle around (1)} Each batch of the drug-containing MCT solution was packaged into 10 vials, followed by marking the name and the batch number.

[0244] {circle around (2)} Three vials from each batch of the samples were stored in a light-tight box, followed by investigation and sample retention according to the conditions in the experimental method.

(3) Samples Were Sent at Day 0:

[0245] {circle around (1)} One vial was taken from each batch of the samples as sample at day 0.

[0246] {circle around (2)} Samples were sent for analysis to detect the related substance and isomer.

[0247] 4. The related substance was determined according to high performance liquid chromatography (General Chapter 0512, China Pharmacopoeia, 2015 Edition).

[0248] (1) Chromatographic conditions: the chromatography column was Agilent ZORBAX SB-C8, 4.6 mm×250 mm, 5 μm, and 0.1% phosphoric acid solution-acetonitrile (50:50) was used as a mobile phase; the detection wavelength was 310 am; the flow rate was 1.0 mL/min; the column temperature was 40° C., and linear gradient elution was performed according to the following table;

[0249] (2) Determination method: an appropriate amount of the product was weighed precisely, a diluent (absolute ethanol) was added and shaken to dissolve, and quantitatively diluted to give a solution containing 0.4 mg per 1 mL, the solution was thawed by vortex for 30 s, and filtered with PTFE filter membrane (0.22 μm, JINTENG), and the filtrate was collected as a test sample solution. 10 μL of the solution was weighed precisely and injected into a liquid chromatograph, and a chromatogram was recorded; if an impurity peak existed in the chromatogram of the test sample solution, calculation was performed according to a peak area normalization method to give the target product.

[0250] 5. Isomer determination was performed according to high performance liquid chromatography (General Chapter 0512, China Pharmacopoeia, 2015 Edition).

[0251] (1) Chromatographic conditions: cellulose-tris(3,5-dimethylphenylcarbamate)silica gel was used as filler (Chiralcel OD-H, 250×4.6 mm, 5 μm); n-hexane-isopropanol (90:10) was used as a mobile phase, and isocratic elution was performed for 25 min at a flow rate of 1.0 mL/min; the column temperature was 35° C.; the detection wavelength was 310 nm.

[0252] (2) Determination method: an appropriate amount of the product was weighed precisely, a diluent (n-hexane-isopropanol (90:10)) was added and shaken to dissolve, and quantitatively diluted to give a solution containing about 1.0 mg per 1 mL, the solution was thawed by vortex for 30 s, and filtered with PTFE filter membrane (0.22 μm, JINTENG), and the filtrate was collected as a test sample solution. 20 p1. of the solution was weighed precisely and injected into a liquid chromatograph, and a chromatogram was recorded; if an isomer peak existed in the chromatogram of the test sample solution, calculation was performed according to a peak area normalization method to give the target product.

[0253] The test results are shown in Table 4:

TABLE-US-00004 TABLE 4 Name and Lofting Ketorolac Purity Isomer Lot No. conditions Time (%) (%) (%) N2(S) MCT 5° C. 0 0.16 99.14 5.65 solution Day 5 0.2 99.08 5.63 Day 15 0.14 99.18 5.87 Day 30 0.25 99.01 5.99 25° C. 0 0.16 99.14 5.65 Day 5 0.21 99.08 5.66 Day 15 0.17 99.13 5.86 Day 30 0.28 98.95 6.01 60° C. 0 0.16 99.14 5.65 Day 5 0.3 98.92 5.7 Day 15 0.49 98.67 5.89 Day 30 0.65 98.38 6.13 N12(S) MCT 5° C. 0 0.02 99.65 3.01 solution Day 5 0.02 99.62 3.05 Day 15 0.02 99.64 3.07 Day 30 0.03 99.55 3.06 25° C. 0 0.02 99.65 3.01 Day 5 0.03 99.59 3.04 Day 15 0.04 99.61 3.09 Day 30 0.07 99.49 3.11 60° C. 0 0.02 99.65 3.01 Day 5 0.09 99.53 3.12 Day 15 0.23 99.35 3.1 Day 30 0.41 99.05 3.48 N15(S) MCT 5° C. 0 0.03 99.48 4.59 solution Day 5 0.02 99.46 4.58 Day 15 0.02 99.45 4.73 Day 30 0.03 99.38 4.62 25° C. 0 0.03 99.48 4.59 Day 5 0.03 99.42 4.58 Day 15 0.03 99.41 4.72 Day 30 0.05 99.33 4.64 60° C. 0 0.03 99.48 4.59 Day 5 0.06 99.35 4.59 Day 15 0.17 99.21 4.75 Day 30 0.35 98.92 4.63 N16(S) MCT 5° C. 0 0.02 99.71 2.46 solution Day 5 0.03 99.55 2.47 Day 15 0.02 99.65 2.6 Day 30 0.03 99.52 2.58 25° C. 0 0.02 99.71 2.46 Day 5 0.03 99.52 2.47 Day 15 0.03 99.63 2.6 Day 30 0.04 99.48 2.59 60° C. 0 0.02 99.71 2.46 Day 5 0.05 99.52 2.48 Day 15 0.12 99.51 2.61 Day 30 0.24 99.27 2.63

[0254] According to the test results, the levorotatory isomer corresponding to the compound of the present disclosure could be placed in an oil phase for 30 days at different temperatures, and the related substance and the isomer could maintain relatively high stability.

Test Example 3: Enzymolysis Kinetics Experiment of Compounds in Plasma

1. Procedures:

[0255] Compounds N2, N8, N12, N15 and N16 formulated in the examples, compound Nil formulated in Comparative Example 1, and flurbiprofen axetil in Comparative Example 2 were subjected to an enzymolysis kinetics experiment in human plasma in batches. The procedures were as follows:

[0256] (1) 4 mM compound NX (X represents different compound numbers), 4 mM methanol stock solution of flurbiprofen axetil and 4 mM methanol stock solution of ketorolac were prepared;

[0257] (2) 25 μL of ketorolac stock solution was mixed with 1 mL of human plasma, the reaction mixture was thawed by vortex for 30 s, followed by sampling 200 μL, 800 μL of acetonitrile was added for settling protein, and thawed by vortex for 1 min to terminate the reaction, and the resulting product was used as ketorolac control:

[0258] (3) 4 mM. compound NX and 4 mM flurbiprofen axetil stock solution were diluted 200-fold as a control;

[0259] (4) 100 μL of methanol stock solution of compound NX and flurbiprofen axetil was weighed and added to 4 mL of human plasma, followed by mixing, the reaction mixture was thawed by vortex for 30 s, and placed in a water-bath constant-temperature oscillator at 37° C. and 100 rpm for oscillation;

[0260] (5) 200 μL samples were taken at different time points (0 min, 15 min, 30 min, 60 min and 120 min), with sampling for 3 times at each time point, 800 μL of acetonitrile was added to settle protein, and thawed by vortex for 1 min to terminate the reaction; and a blank plasma control was made by using the same method;

[0261] (6) the reaction solution was centrifuged at 12000 rpm and 4° C. for 10 min, the supernatant was collected and injected for 30 μL (via filter membrane), and peak area changes were recorded (shown in FIGS. 2); and

[0262] (7) the metabolic rate of compound NX and flurbiprofen axetil was observed and analyzed, and an appropriate compound NX was screened out according to the data.

2. Experimental Results:

[0263] 1) The content changes of compound N-2 and ketorolac generated by metabolism are shown in Table 5; plasma metabolic rates of compound N2 at different time points are shown in FIG. 6.

TABLE-US-00005 TABLE 5 0 min 15 min 30 min 60 min 120 min Content of the compound % 98.950 ± 3.765 88.103 ± 2.289 72.813 ± 2.707 47.510 ± 1.739 12.573 ± 0.260 Content of ketorolac %  1.050 ± 0.079  8.860 ± 0.426 20.993 ± 0.561 34.590 ± 1.381 59.790 ± 2.019

[0264] 2) The content changes of compound NS and ketorolac generated by metabolism are shown in Table 6; plasma metabolic rates of compound N8 at different time points are shown in FIG. 7.

TABLE-US-00006 TABLE 6 0 min 15 min 30 min 60 min 120 min Content of the compound % 100 ± 1.782 69.713 ± 6.985 42.467 ± 2.983  8.777 ± 0.560 0 Content of ketorolac % 0 19.140 ± 1.467 36.277 ± 3.301 53.130 ± 2.171 65.997 ± 3.446

[0265] 3) The content changes of compound N12 and ketorolac generated by metabolism are shown in Table 7; plasma metabolic rates of compound N I 2 at different time points are shown in FIG. 8.

TABLE-US-00007 TABLE 7 0 min 15 min 30 min 60 min 120 min Content of the compound % 97.967 ± 6.878 56.277 ± 3.890 25.590 ± 1.131 5.997 ± 0.976 0 Content of ketorolac %  2.033 ± 0.342 34.203 ± 3.165 53.297 ± 1.296 76.623 ± 10.483 87.973 ± 4.045

[0266] 4) The content changes of compound N15 and ketorolac generated by metabolism are shown in Table 8; plasma metabolic rates of compound N15 at different time points are shown in FIG. 9; a liquid chromatogram of the degradation of compound N13 in human plasma is shown in 10.

TABLE-US-00008 TABLE 8 0 min 15 min 30 min 60 min 120 min Content of the compound % 99.560 ± 2.324 76.800 ± 2.423 46.680 ± 2.229 12.760 ± 1.133  0.893 ± 0.051 Content of ketorolac %  1.727 ± 1.502 23.933 ± 1.119 50.917 ± 1.868 83.957 ± 3.139 96.910 ± 3.848

[0267] 5) The content changes of compound N16 and ketorolac generated by metabolism are shown in Table 9; plasma metabolic rates of compound N-16 at different time points are shown in FIG. 11.

TABLE-US-00009 TABLE 9 0 min 15 min 30 min 60 min 120 min Content of the compound % 100 ± 4.001 82.710 ± 1.909 65.987 ± 0.506 35.437 ± 1.960  7.047 ± 0.374 Content of ketorolac % 0  9.847 ± 2.479 28.653 ± 0.277 56.793 ± 2.096 70.443 ± 4.274

[0268] 6) The content changes of compound N26 and ketorolac generated by metabolism are shown in Table 1; plasma metabolic rates of compound N26 at different time points are shown in FIG. 16.

TABLE-US-00010 TABLE 10 1 min 15 min 30 min 60 min 120 min Content of the compound % 100 100 95.48 ± 1.56 89.20 ± 1.67 68.99 ± 1.45 Content of ketorolac % 0 0  3.89 ± 0.61  8.60 ± 0.33 24.34 ± 0.90

[0269] 7) The content changes of compound N27 and ketorolac generated by metabolism are shown in Table 2; plasma metabolic rates of compound N27 at different time points are shown in FIG. 17.

TABLE-US-00011 TABLE 11 1 min 15 min 30 min 60 min 120 min Content of the compound % 100 100 90.63 ± 1.81 63.89 ± 1.20 35.75 ± 1.46 Content of ketorolac % 0 0 9.89 ± 0.8 37.78 ± 1.13 66.73 ± 1.73

[0270] 8) The content changes of compound N11. in Comparative Example 1 and ketorolac generated by metabolism are shown in Table 12; plasma metabolic rates of compound N11 at different time points are shown in FIG. 12; a liquid chromatogram of the degradation of compound N11 in human plasma is shown in FIG. 13.

TABLE-US-00012 TABLE 12 0 min 15min 30 min 60 min 120 min Content of the compound % 99.700 ± 2.928 99.813 ± 4.881 89.807 ± 2.538 83.490 ± 9.087 65.997 ± 3.446 Content of ketorolac % 0 0 0  2.270 ± 0.328  9.840 ± 1.977

[0271] 9) The content changes of flurbiprofen axetil in Comparative Example 2 and flurbiprofen generated by metabolism are shown in Table 13; plasma metabolic rates of flurbiprofen axetil at different time points are shown in FIG. 14.

TABLE-US-00013 TABLE 13 0 min 15 min 30 min 60 min 120 min Content of the compound % 99.285 ± 3.049 76.265 ± 3.146 61.665 ± 1.372 37.618 ± 4.180 15.152 ± 2.400 Content of flurbiprofen % 0 15.657 ± 0.432 27.593 ± 1.075 36.193 ± 4.749 53.317 ± 3.102

[0272] As can be seen from the test results, the compounds described above could be degraded in human plasma and metabolized to generate corresponding metabolites (ketorolac or flurbiprofen). Wherein, flurbiprofen axetil could be metabolized faster with an increase in the content of flurbiprofen as a metabolite, but only 50% of flurbiprofen produced. However, the metabolic rate of compound N11 was slow, the content of the compound was still kept to be nearly 70% after 120 min, and the generated amount of ketorolac was less than 10%; the remaining compounds N2, N8, N12, N15 and N16 all showed accelerated degradation and increased production of ketorolac.

Test Example 4

[0273] From the concentration versus time relationship, the hydrolysis process of the compounds follows first order reaction kinetics, and by plotting the natural logarithm of the concentrations of the remaining compounds versus time, a straight line could be obtained, a reaction rate constant k was obtained from a slope thereof, and the half-life period was calculated from t.sub.1/2=0.693/k. The test results are shown in Table 12:

TABLE-US-00014 TABLE 12 Name of the compounds T½(min) N2 38.56 N8 16.93 N12 14.77 N15 16.93 N16 31.55 N11 347 N26 176.83 N27 73.88 FPA 40.82

[0274] As can be seen from the test results, the degradation rate of compound N11 was relatively slow, and the half-life period is relatively long (T.sub.1/2=347 min); the half-life period of FPA was 40.82 min, similar to that of compound N2 (T.sub.1/2=38.56 min); the metabolic rates of compound N8 (T.sub.1/2=16.93 min), compound N12 (T.sub.1/2=14,77 min) and compound N 15 (T.sub.1/2=16.93 min) were all relatively fast, and all of the compounds had similar half-life periods. In general, the compounds claimed in the present disclosure have half-life periods less than FPA, indicating that they are rapidly degraded in human plasma and produce the active metabolite ketorolac, thus exerting corresponding physiological effects.

Test Example 5

[0275] By-product toxicity test: according to the test of the toxicity of the metabolic byproducts by the metabolic pathways of the compounds in the human body, the metabolic byproducts and the toxicity of compounds N2-N22 in the human body are shown in the following table:

TABLE-US-00015 Metabolic by-products in Nos. human body Toxicity N2 Acetaldehyde and isopropyl alcohol relatively low N3 Propionaldehyde and acetic acid relatively low N4 Acetaldehyde and propionic acid relatively low N5 Isobutyraldehyde and acetic acid Isobutyraldehyde is more toxic N6 Acetaldehyde and isobutyric acid Isobutyric acid is more toxic N7 Acetaldehyde and pivalic acid Pivalic acid is more toxic N8 Propionaldehyde and propionic relatively low acid N9 Isobutyraldehyde and propionic Isobutyraldehyde is more acid toxic N10 Acetaldehyde and cyclohexanol relatively low N12 Acetaldehyde and acetic acid relatively low N13 Acetaldehyde and methanol Methanol is more toxic N14 Propionaldehyde and methanol Methanol is more toxic N15 Propionaldehyde and ethanol relatively low N16 Acetaldehyde and isopropyl relatively low alcohol N17 Isobutyraldehyde and methanol Isobutyraldehyde and methanol are more toxic N18 Isobutyraldehyde and ethanol Isobutyraldehyde is more toxic N19 Isobutyraldehyde and isopropyl Isobutyraldehyde is more alcohol toxic N20 Propionaldehyde and cyclohexanol relatively low N21 Isobutyraldehyde and cyclohexanol Isobutyraldehvde is more toxic N22 Acetaldehyde relatively low N26 Acetaldehyde, carbon dioxide, and n-octanol is more toxic n-octanol N27 Acetaldehyde and n-heptanoic acid low

[0276] According to the test data described above, the series of compounds have relatively low toxicity of byproducts after being metabolized in a human body, particularly, compounds N2, N3, N4, N8, N10, N12, N15, N16, N20, N21, N22, N26 and N27 have good clinical application prospects of drugs. Compounds N2, N8, N12, N15 and N16 and levorotatory enantiomers thereof, namely isomers with the carbon atom at position 1 being an S configuration, have low toxicity of byproducts after being metabolized in a human body and higher metabolic rates, are more suitable for being developed into injection formulations, and the route of administration can be selected from: subcutaneous injections, intramuscular injections, intravenous bolus injections, intravenous drip, etc.

[0277] In addition, compounds N10, N20, N21 and N22 and the levorotatory enantiomers thereof, namely the isomers with the carbon atom at position I being an S configuration, have relatively low toxicity of byproducts generated after being metabolized in a human body, have slow metabolic rates, and are more suitable for being developed into long-acting sustained-release formulations.

[0278] The embodiments of the present disclosure have been described above. However, the present disclosure is not limited the embodiments described above. Any modification, equivalent, improvement and the like made without departing from the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.