103788-62-1Relevant articles and documents
General Photoinduced Sequential Electrocyclization/[1,9]-Sigmatropic Rearrangement/Ring-Opening Reaction of Diarylethenes
Lvov, Andrey G.,Shirinian, Valerii Z.,Zakharov, Alexey V.,Krayushkin, Mikhail M.,Kachala, Vadim V.,Zavarzin, Igor V.
, p. 11491 - 11500 (2015/12/04)
A novel and efficient photochemical transformation of diarylethenes comprising a five-membered heterocyclic ring and phenyl moiety is described. This reaction provides a simple method for the preparation of functionalized naphthalene derivatives via photorearrangement reaction of diarylethenes, and the process is characterized by high efficiency that was determined by NMR monitoring. Some mechanistic aspects of this process have been also explored. It was found that the reaction includes tandem transformation of three basic processes: the photocyclization of the hexatriene system, [1,9]-sigmatropic rearrangement, and heterocyclic ring opening. Diarylethenes with different heterocycle moieties (thiophene, benzo[b]thiophene, furan, indole, imidazole, thiazole, oxazole, pyrazole) have been involved into this process, and the target naphthalenes with good yields have been obtained. The opportunity for use in the transformation of diarylethenes with different heterocyclic residues permits synthesis of naphthalenes with desired functional groups. The general character and high efficiency of the reaction promise that the transformation can be an effective synthetic route for the annulation of benzene rings to various aromatic systems, including heterocycles.
Oxazolidinedione hypoglycemic agents
-
, (2008/06/13)
Compounds of the formulae STR1 where R is cycloalkyl or aryl; R1 is alkyl, X is O or C=O; A is O or S; and B is N or CH are useful as hypoglycemic agents.
Thiazolidinedione derivatives, their production and use
-
, (2008/06/13)
Thiazolidinedione derivatives of the general formula: STR1 [wherein R1 is hydrogen or a hydrocarbon residue or heterocyclic residue which may each be substituted; R2 is hydrogen or lower alkyl which may be substituted by hydroxyl group; X is an oxygen or sulfur atom; Z is a hydroxylated methylene or carbonyl; m is 0 or 1; n is an integer of 1 to 3; L and M represent independently a hydrogen atom or L and M combine with each other to cooperate jointly to form a linkage] and their salts, which are novel compounds, possess blood-glucose and blood-lipid lowering actions in mammals, and are of value as a therapeutic agent for diabetes and therapeutic agent for hyperlipemia.
