TBAF-Promoted Dehydrobrominations of Vicinal Dibromides Having an Adjacent O-Functional Group
作者:Noriki Kutsumura、Takao Saito、Keisuke Kubokawa
DOI:10.1055/s-0030-1258813
日期:2010.11
Regioselective HBr elimination of vicinal dibromides having an adjacent oxygen functional group to give the corresponding 2-bromoalk-1-enes was controlled using 1.1 equivalents of TBAF. Two-step elimination to give the corresponding alkynes was controlled using 5.0 equivalents of TBAF. High yield and high selectivity require the presence of an oxygen functional group at the neighboring position of the elimination site.
使用 1.1 当量的 TBAF 可控制具有相邻氧官能团的邻位二溴化物的区域选择性 HBr 消去,得到相应的 2-溴烷基-1-烯。使用 5.0 等量的 TBAF 可以控制两步消去生成相应的炔烃。高产率和高选择性要求在消除位点的邻近位置存在氧官能团。