MeOH or H 2 O as efficient additive to switch the reactivity of allylSmBr towards carbonyl compounds
作者:Jianyong Li、Qingsheng Niu、Shanchan Li、Yuehao Sun、Qian Zhou、Xin Lv、Xiaoxia Wang
DOI:10.1016/j.tetlet.2017.01.091
日期:2017.3
aryl ketones mediated by Sm/alkyl halide/MeOH. The results demonstrate that the real reducing species in Sm/alkyl halide/MeOH system should be allylSmBr, and MeOH has elegantly switched the reactivity of allylSmBr from being nucleophilic to being good reductive coupling reagent. Besides, H2O was also found to be a useful additive to realize the pinacol coupling of aliphatic aldehydes and ketones promoted