Copper-catalyzed highly selective synthesis of 2-benzyl- and 2-benzylidene-substituted benzo[<i>b</i>]thiazinones from 2-iodophenylcinnamamides and potassium sulfide
作者:Wenjuan Liu、Hao Min、Xiaoming Zhu、Guobo Deng、Yun Liang
DOI:10.1039/c7ob02585h
日期:——
An efficient and practical procedure for the synthesis of 2-benzyl- and 2-benzylidene-substituted benzo[b]thiazinones from easily available 2-iodophenylcinnamamides and potassium sulfide has been developed. In the presence of DBU, the reaction proceeds via electrophilic addition, followed by dehydrogenation and reduction to give 2-benzyl benzo[b]thiazinones. Furthermore, 2-benzylidenebenzo[b]thiazinones
已经开发了一种由容易获得的2-碘苯基肉桂酰胺和硫化钾合成2-苄基和2-亚苄基取代的苯并[ b ]噻嗪酮的有效且实用的方法。在DBU的存在下,反应通过亲电加成进行,然后脱氢并还原,得到2-苄基苯并[ b ]噻嗪酮。此外,在不添加DBU的情况下,以中等至良好的产率获得了2-亚苄基苯并[ b ]噻嗪酮。