Synthesis of 2,3,4,5-Tetrahydrobenzo[1,4]thiazepines via <i>N</i>-Acyliminium Cyclization
作者:Shixian Deng、Zhenzhuang Cheng、Charles Ingalls、Ferenc Kontes、Jiaming Yan、Sandro Belvedere
DOI:10.1021/acs.oprd.7b00260
日期:2017.11.17
5-tetrahydrobenzo[1,4]thiazepine, the core structure of biologically active molecules like JTV-519 and S107. This synthetic route, starting with 4-methoxythiophenol and proceeding via acyliminum cyclization, gives the target product in four steps and 68% overall yield and is a substantial improvement over previously published processes. Nine additional examples of tetrahydrobenzo[1,4]thiazepine synthesis
我们报告了7-甲氧基-2,3,4,5-四氢苯并[1,4]硫氮平的有效和可扩展的合成,该生物活性分子如JTV-519和S107的核心结构。该合成路线从4-甲氧基硫酚开始,并通过亚胺基环化进行,分四个步骤提供目标产物,总收率达68%,与以前公布的工艺相比有实质性的改进。还提供了通过酰基亚胺环闭环合成四氢苯并[1,4]噻氮平的另外九个实例。