Regio- and stereoselective hydroxybromination and dibromination of olefins using ammonium bromide and oxone®
作者:Arun Kumar Macharla、Rohitha Chozhiyath Nappunni、Narender Nama
DOI:10.1016/j.tetlet.2012.01.026
日期:2012.3
synthesis of vicinal bromohydrins and dibromides from olefins is presented. Various olefins are regio- and stereoselectively hydroxybrominated and dibrominated with anti fashion, following Markonikov’s rule, using eco-friendly, non-toxic, and stable reagents such as NH4Br and oxone® in CH3CN/H2O (1:1) and CH3CN without employing catalyst in moderate to excellent yields. Bromohydrins are formed instantaneously
提出了从烯烃合成邻位溴代醇和二溴化物的有效方案。各种烯烃是区域选择性和立体选择性hydroxybrominated并用二溴化抗时尚,以下Markonikov的规则,使用环保的,无毒的,和稳定的试剂,例如NH 4 Br和在的冰冷CH 3 CN / H 2 O(1:1 )和CH 3 CN,而无需使用催化剂即可获得中等至极好的收率。溴代醇立即形成。