Facile metal free regioselective transfer hydrogenation of polarized olefins with ammonia borane
作者:Xianghua Yang、Thomas Fox、Heinz Berke
DOI:10.1039/c0cc03163a
日期:——
Transfer hydrogenation of polarized olefins bearing strongly electron-withdrawing groups on one side of the double bond was achieved with ammonia borane under mild conditions without using a catalyst. Mechanistic studies proved the character of the direct H transfers proceeding stepwise with a unique hydroboration intermediate and hydride before proton transfer.
用氨硼烷在温和条件下不使用催化剂就可实现在双键一侧带有强吸电子基团的极化烯烃的转移加氢。机理研究证明,在质子转移之前,先用独特的硼氢化中间体和氢化物逐步进行氢的直接转移。