使用4-羟基-4-烷氧基羰基-3,5-二芳基-2-芳基噻吩并(selena)唑烷作为通用试剂单锅合成噻唑并[3,4- a ]喹喔啉及相关杂环系统
摘要:
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。。
One-Pot Synthesis of Thiazolo[3,4-<i>a</i>]Quinoxalines from 1,2-Diamines, Aryl Isothiocyanates and Ethyl Bromopyruvate
作者:Mohammad Piltan
DOI:10.3184/174751917x15127369231305
日期:2017.12
hitherto unreported thiazolo[3,4-a]quinoxaline derivatives have been synthesised in excellent yields via a one-pot, three-component reaction of benzene-1,2-diamines, ethyl bromopyruvate and aryl isothiocyanates in MeCN, for the first time. The protocol avoids the use of any catalysts or chromatographic separations and provides a wide range of novel thiazolo[3,4-a]quinoxalines.