Disclosed herein are cyclic thiol prodrugs, and pharmaceutical compositions thereof. The prodrugs and pharmaceutical compositions thereof may be used to treat or prevent medical disorders such as, for example, cystinuria, cystinosis, cancer, neurodegenerative disease, Parkinson’s disease, Huntington’s disease, malaria, nonalcoholic fatty liver disease, radiation poisoning, arsenic poisoning, radioprotection, Wilson’s disease or rheumatoid arthritis.

The disclosure describes chiral P(V)-based reagents and their uses for the modular, scalable, and stereospecific synthesis of chiral phosphines, phosphine oxides and particular oligonucleotides.

A heterocyclic compound represented by Formula 1: ##STR00001##
wherein A.sub.1 in Formula 1 is selected from groups represented by Formulae 1-1 to 1-7, ##STR00002##
and an organic light-emitting device including the same.

A light emitting diode includes a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer includes a compound represented by Formula 1, thereby exhibiting high efficiency and long lifespan.

##STR00001##

A dithienophosphorine compound having a cation represented by the formula

##STR00001##

(wherein Y represents an oxygen atom or a sulfur atom; R.sup.1 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group; R.sup.2 represents a hydroxy group, an alkyl group, an alkoxy group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group; R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group; R.sup.7 and R.sup.8 each independently represents an arylene group or a heteroarylene group; R.sup.9 and R.sup.10 each independently represent a hydrogen atom, a halogen atom, a sulfonyl group, an alkyl group or an aryl group; each group may have one or more substituents; and R.sup.3, R.sup.4, and R.sup.7 may bind to each other and/or R.sup.5, R.sup.6, and R.sup.8 may bind to each other to form a ring together with an adjacent nitrogen atom) is an organic compound that has a maximum absorption wavelength in the NIR-II region (from 1000 to 1500 nm) although the molecular weight thereof is not extremely high, and that has excellent solubility in organic solvents and high structural selectivity.

The present disclosure provides a compound for a display panel. The compound includes elements selected from O, S or N, electron-donor groups and electron-accepting groups. The OLED device in the display panel includes an anode, a cathode, and at least one organic thin film layer between the anode and the cathode. The organic thin film layer includes a light emitting layer, the light emitting layer includes the compound of the present disclosure, and the compound is used to be any one of a host material, a doping material, and a co-doping material. The compound reduces energy level difference between singlet and triplet states ΔE.sub.ST through design of the compound molecular structure. The compound realizes an efficient reverse intersystem crossing process, has typical TADF characteristics, and can be used as a light-emitting layer material of an OLED device to improve luminous efficiency and working life.

The present disclosure provides a compound for a display panel. The compound includes elements selected from O, S or N, electron-donor groups and electron-accepting groups. The OLED device in the display panel includes an anode, a cathode, and at least one organic thin film layer between the anode and the cathode. The organic thin film layer includes a light emitting layer, the light emitting layer includes the compound of the present disclosure, and the compound is used to be any one of a host material, a doping material, and a co-doping material. The compound reduces energy level difference between singlet and triplet states ΔE.sub.ST through design of the compound molecular structure. The compound realizes an efficient reverse intersystem crossing process, has typical TADF characteristics, and can be used as a light-emitting layer material of an OLED device to improve luminous efficiency and working life.

A polycyclic compound according to an embodiment of the inventive concept is represented by the following Formula 1:

##STR00001##

In Formula 1, Ar.sub.1 and Ar.sub.2 are each independently substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, where Ar.sub.1 and Ar.sub.2 may combine with each other to form a ring, and A is represented by the following Formula 2-1 or 2-2:

##STR00002##

The present disclosure relates to a compound, an organic electroluminescent device, and a display device. The compound has a structure of formula (I) ##STR00001## X is selected from a C atom, a Si atom, a B atom, or a P atom; Y.sub.1 to Y.sub.4 are each independently selected from a C atom or an N atom; A and B are each independently selected from any one or more of a substituted or unsubstituted C6-C40 aryl group and a substituted or unsubstituted C4-C40 heteroaryl group; R.sub.1 is selected from carbonyl, C1-C9 alkyl, a substituted or unsubstituted C6-C18 aryl group, and a substituted or unsubstituted C4-C30 heteroaryl group; and R.sub.2 and R.sub.3 are each independently selected from any one of a C1-C9 alkyl group, a substituted or unsubstituted C6-C18 aryl group, and a substituted or unsubstituted C4-C30 heteroaryl group, and n is selected from 0 or 1.

A compound according to an embodiment of the present disclosure is represented by Formula 1. An electrolyte for a lithium secondary battery according to an embodiment of the present disclosure may include the compound, and a lithium secondary battery according to an embodiment of the present disclosure may include the electrolyte.