1241921-09-4Relevant articles and documents
One-pot synthesis of thiazolo[3,4-a]quinoxalines and the related heterocyclic systems using 4-hydroxy-4-alkoxycarbonyl-3,5-diaryl-2- aryliminothia(selena)zolidines as versatile reagents
Mamedov, Vakhid A.,Zhukova, Nataliya A.,Balandina, Alsu A.,Kharlamov, Sergey V.,Beschastnova, Tat'Yana N.,Rizvanov, Il'Dar Kh.,Latypov, Shamil K.
experimental part, p. 7363 - 7373 (2012/09/22)
An efficient and versatile one-step method for the synthesis of thiazolo[3,4-a]quinoxalines and related new heterocyclic systems have been developed on the basis of a new strategy for the construction of the pyrazine ring system. The key step of the process involves the cascade annulation of the iminothiazolopyrazine system to benzene in the reaction of 4-hydroxy-3,5-diaryl- 2-phenyliminothiazolidines with 1,2-diaminobenzenes. The use of selenium analogues instead of thiazolidine derivatives in this reaction, leads to selenazolo[3,4-a]quinoxalines and the use of aza analogues instead of 1,2-diaminobenzenes gives aza analogues of thiazolo[3,4-a]quinoxalines.
Polyfused nitrogen-containing heterocycles 23.* Methyl 4-hydroxy-3-phenyl-5-phenyl(alkyl)-2-phenyliminoselenazolidine-4-carboxylates and selenazolo[3,4-a]quinoxalin-4(5H)-one derivatives on their basis
Mamedov,Zhukova,Gubaidullin,Beschastnova,I. Kh. Rizvanov,Ya. A. Levin,Litvinov
, p. 1294 - 1302 (2010/10/04)
Condensation of methyl phenyl(alkyl)halopyrotartrates with N, N'-diphenylselenourea leads to the formation of methyl 4-hydroxy-3-phenyl-5- phenyl(alkyl)-2-phenyliminoselenazolidine-4-carboxylates, which undergo reaction with 1,2-phenylenediamines to give selenazolo-[3,4-a]quinoxalin-4(5H)-ones. ; 2009 Springer Science+Business Media, Inc.
