Copper-catalyzed highly selective synthesis of 2-benzyl- and 2-benzylidene-substituted benzo[<i>b</i>]thiazinones from 2-iodophenylcinnamamides and potassium sulfide
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。
作者:S. Renganayaki、E. Subramanian、S. Shanmuga Sundara Raj、H.-K. Fun
DOI:10.1107/s010827019900791x
日期:1999.10.15
In the title compound, C16H13ClINO, the cinnamamide group is almost planar. The phenyl rings are almost perpendicular, making an interplanar angle of 83.1(1)degrees with one another. The molecules are packed as dimers through C-H ... O hydrogen bonds.