Patent classifications
C07D301/14
PROCESSES FOR PREPARING A (1,2-DIMETHYL-3-METHYLENECYCLOPENTYL)ACETATE COMPOUND AND (1,2-DIMETHYL-3-METHYLENECYCLOPENTYL)ACETALDEHYDE
The present invention provides a process for preparing a (1,2-dimethyl-3-methylenecyclopentyl)acetate compound of the following general formula (3), wherein R represents a linear or branched alkyl group having 1 to 4 carbon atoms, the process comprising subjecting a haloacetaldehyde alkyl 2,3-dimethyl-2-cyclopentenyl acetal compound of the following general formula (1), wherein R is as defined above, and Y represents a halogen atom, to a dehydrohalogenation reaction in the presence of a base, followed by a rearrangement reaction to obtain a (1,2-dimethyl-2-cyclopentenyl)acetate compound of the following general formula (2), wherein R is as defined above, and subjecting the (1,2-dimethyl-2-cyclopentenyl)acetate compound (2) to an epoxidation reaction, followed by an isomerization reaction and then a methylenation reaction to obtain the (1,2-dimethyl-3-methylenecyclopentyl)acetate compound of the following general formula (3). The present invention also provides a process for preparing (1,2-dimethyl-3-methylenecyclopentyl)acetaldehyde of the following formula (4), the process comprising the aforesaid process for preparing the (1,2-dimethyl-3-methylenecyclopentyl)acetate compound (3), and converting an alkoxycarbonylmethyl group (i.e., —CH.sub.2C(═O)OR) of the (1,2-dimethyl-3-methylenecyclopentyl)acetate compound (3) to a formylmethyl group (i.e., —CH.sub.2CHO) to obtain (1,2-dimethyl-3-methylenecyclopentyl)acetaldehyde (4).
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CURABLE COMPOSITION, CURED PRODUCT, ELECTRONIC DEVICE, DISPLAY DEVICE, OPTICAL MEMBER, POLYMER, PHOTOSENSITIVE COMPOSITION, PATTERN, AND COMPOUND
A curable composition including a first compound having a group represented by general formula (x) and an epoxy group and having a molecular weight of 1000 or less. In the general formula (x), Rf.sub.1 and Rf.sub.2 each independently represent a fluorine-containing alkyl group.
—C(Rf.sub.1)(Rf.sub.2)—OH (x)
SYNTHESIS OF METHYL 2-FLUOROACRYLATE
Methods for the synthesis of methyl 2-fluoroacrylate (MFA) are provided. The methods include use of various hydrofluorination agents using a variety of starting materials and reaction schemes. The methyl 2-fluoroacrylate prepared by the methods described herein can further be used to prepare patiromer calcium sorbitex.
NEBIVOLOL SYNTHESIS METHOD AND INTERMEDIATE COMPOUND THEREOF
The present invention relates to a nebivolol synthesis method and intermediate compound thereof. Specifically, the present invention relates to a method for synthesizing nebivolol, intermediate compound thereof, and a method for preparing the intermediate compound.
NEBIVOLOL SYNTHESIS METHOD AND INTERMEDIATE COMPOUND THEREOF
The present invention relates to a nebivolol synthesis method and intermediate compound thereof. Specifically, the present invention relates to a method for synthesizing nebivolol, intermediate compound thereof, and a method for preparing the intermediate compound.
Preparation Of Thermoplastic Epoxidized Polymers And Thermosetting Materials From Triglycerides
A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.
Preparation Of Thermoplastic Epoxidized Polymers And Thermosetting Materials From Triglycerides
A method i for forming an epoxidized polymer is provided. The method may include mixing an epoxidized plant oil with a synthetic epoxy resin and crosslinking the epoxidized plant oil and the synthetic epoxy resin using a curing agent. The epoxidized plant oil may be formed via: converting plant oil triglycerides to fatty amide alcohols via aminolysis using primary or secondary amines, converting the fatty amide alcohols to epoxidized fatty amide alcohols, and reacting the epoxidized fatty amide alcohols with vinyl monomers to obtain epoxidized plant oil monomers.
PREPARATION METHOD FOR PROPYLENE EPOXIDATION CATALYST AND USE THEREOF
Provided are a preparation method for a propylene epoxidation catalyst, and a use thereof. During the preparation, an alkoxide solution of a prepared active component and a silica gel support are mixed, then a rotary evaporation treatment is performed on the mixture to remove a low-carbon alcohol to obtain a catalyst precursor, and then the obtained catalyst precursor is subjected to calcination and silylation treatments to obtain the propylene epoxidation catalyst. The catalyst is prepared in a simple process, can be applied to the chemical process of preparing propylene oxide by propylene epoxidation, has high average selectivity to propylene oxide, and has industrial application prospect.
PREPARATION METHOD FOR PROPYLENE EPOXIDATION CATALYST AND USE THEREOF
Provided are a preparation method for a propylene epoxidation catalyst, and a use thereof. During the preparation, an alkoxide solution of a prepared active component and a silica gel support are mixed, then a rotary evaporation treatment is performed on the mixture to remove a low-carbon alcohol to obtain a catalyst precursor, and then the obtained catalyst precursor is subjected to calcination and silylation treatments to obtain the propylene epoxidation catalyst. The catalyst is prepared in a simple process, can be applied to the chemical process of preparing propylene oxide by propylene epoxidation, has high average selectivity to propylene oxide, and has industrial application prospect.
ALICYCLIC EPOXY COMPOUND PRODUCT
Provided is an alicyclic epoxy compound product used in applications for forming a cured product excellent in transparency and heat resistance. An alicyclic epoxy compound product of the present disclosure has a purity of a compound represented by Formula (1) of 85 wt. % or greater; and a total content of a compound represented by Formula (a) and a compound represented by Formula (b) of 0.5 wt. % or less, where X represents a single bond or a linking group. The alicyclic epoxy compound product of the present disclosure can be produced through subjecting a compound represented by Formula (1″) to a dehydration reaction to obtain a compound represented by Formula (1′), and reacting the resulting compound represented by Formula (1′) with an organic peracid.
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