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
作者:Vakhid A. Mamedov、Nataliya A. Zhukova、Alsu A. Balandina、Sergey V. Kharlamov、Tat'yana N. Beschastnova、Il'dar Kh. Rizvanov、Shamil K. Latypov
DOI:10.1016/j.tet.2012.06.084
日期:2012.9
An efficient and versatile one-step method for the synthesis of thiazolo[3,4-a]quinoxalines and related newheterocyclic 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
在构建吡嗪环系统的新策略的基础上,开发了一种高效且通用的一步法合成噻唑并[3,4- a ]喹喔啉和相关的新杂环系统。该方法的关键步骤涉及在4-羟基-3,5-二芳基-2-苯基亚甲基噻唑烷与1,2-二氨基苯的反应中,亚氨基咪唑并吡嗪系统级联成苯。在该反应中使用硒类似物代替噻唑烷衍生物,会导致硒代氮杂[3,4- a ]喹喔啉,而用氮杂类似物代替1,2-二氨基苯得到噻唑并[3,4- a ]喹喔啉的氮杂类似物。。
Fused polycyclic nitrogen-containing heterocycles
作者:V. A. Mamedov、N. A. Zhukova、T. N. Beschastnova、Ya. A. Levin、A. T. Gubaidullin、I. A. Litvinov
DOI:10.1007/s11172-007-0365-9
日期:2007.11
The condensation of methyl phenylchloropyruvate with 1-phenyl-3-(2-pyridyl)thiourea and its 3-and 4-picolyl homologs affords the corresponding 4-hydroxythiazolidines, which react with o-phenylenediamine to give one of two possible thiazolo[3,4-a]quinoxalines containing the pyridyl-or picolylimine substituents at position 1. 3a-Hydroxy-3-phenylimino-1-(2-pyridyl)thiazolo[3,4-a]quinoxalin-4-(3H,5H)-one