Efficient Approach to 3,3-Bissilyl Carbonyl and Enol Derivatives via Retro-[1,4] Brook Rearrangement of 3-Silyl Allyloxysilanes
作者:Zhenlei Song、Zheng Lei、Lu Gao、Xia Wu、Linjie Li
DOI:10.1021/ol102352w
日期:2010.11.19
A facile and highly stereoselective retro-[1,4] Brook rearrangement of 3-silyl allyloxysilanes has been discovered. While basic hydrolysis of the formed (Z)-3,3-bissilyl lithium enolates provides 3,3-bissilyl carbonyl compounds efficiently, trapping the species with various electrophiles including alkyl halides leads to the exclusive O-substituted (Z)-3,3-bissilyl enol derivatives that can undergo
已经发现了3-甲硅烷基烯丙氧基硅烷的容易且高度立体选择性的逆[1,4]布鲁克重排。虽然所形成的(Z)-3,3-双甲硅烷基烯醇锂的碱性水解可有效地提供3,3-双甲硅烷基羰基化合物,但用包括烷基卤化物在内的各种亲电试剂捕获该物种会导致排他的O-取代的(Z)-3,3 -双甲硅烷基烯醇衍生物,其可以与醛发生樱井反应,以选择性地生产合成上有用的1,2-二醇。