Fused polycyclic nitrogen-containing heterocycles 15.* 1,3-bis(4-hydroxy-4-methoxycarbonyl-3,5-diphenylthiazolidin-2-ylideneamino) -benzene in the synthesis of thiazolo[3,4-a]quinoxalines

Abstract

Reactions of methyl chloro(phenyl)pyruvate with 1,3-bis(phenylthioureido) benzene easily afforded 1,3-bis(4-hydroxy-4-methoxycarbonyl-3,5- diphenylthiazolidin-2-ylideneamino)benzene. Reactions of the latter with 1,2-phenylenediamines gave various derivatives of thiazolo[3,4-a]quinoxalines, including their bisanalogs. © 2006 Springer Science+Business Media, Inc.