A novel and highly stereo and regioselective oxidative iodination of 1,4-diarylbuta-1,3-diynes promoted by N-iodosuccinamide results in (Z)-2,3-diiodo-1,4-diarylbut-2-ene-1,4-diones. In the case of NBS, the stereo-selectivity is moderate while NIS gives exclusively Z product. A plausible mechanism for the formation of both E and Z products is also proposed.
一种新颖且具有高立体和区域选择性的氧化
碘化反应,由N-
碘代琥珀
酰亚胺促进的1,4-二芳基丁a-1,3-二炔,生成(Z)-2,3-二
碘-1,4-二芳基丁-2-烯-1,4-二酮。在使用
NBS的情况下,立体选择性中等,而NIS则完全生成Z型产物。同时,也提出了形成E和Z产物的可能机制。