A Straightforward Approach for the Synthesis of Novel Derivatives of Benzo[b]pyrazolo[5′,1′:2,3]pyrimido[4,5-e][1,4]thiazine
作者:Seddigheh Sheikhi-Mohammareh、Ali Shiri、Mehdi Bakavoli、Joel Mague
DOI:10.1002/jhet.2432
日期:2016.7
Several derivatives of the novel benzo[b]pyrazolo[5′,1′:2,3]pyrimido[4,5‐e][1,4]thiazine ring system have been synthesized through the one‐pot cyclocondensation of 6‐bromo‐7‐chloro‐2‐(ethylthio)‐5‐methylpyrazolo[1,5‐a]pyrimidine‐3‐carbonitrile (4) with o‐aminothiophenol in the presence of Et3N in CH3CN. The true regio isomer (5) was also determined by X‐ray crystallographic analysis. The N‐alkylation
通过6-溴的一锅环缩合反应合成了新型苯并[b]吡唑并[5',1':2,3]嘧啶[4,5-e] [1,4]噻嗪环系统的几种衍生物在CH 3 CN中存在Et 3 N的情况下,带有邻氨基硫酚的-7-氯-2-(乙硫基)-5-甲基吡唑并[1,5-a]嘧啶-3-腈(4)。真正的区域异构体(5)也通过X射线晶体学分析确定。还完成了合成化合物(5)的N-烷基化反应。