Stereoselective synthesis of vinylsilanes from alkynylsilanes by reductive alkylation via hydroboration, transmetallation and carbodemetallation
作者:K. Uchida、K. Utimoto、H. Nozaki
DOI:10.1016/0040-4020(77)88034-4
日期:1977.1
Hydroboration of 1-trimethylsilyl-1-alkynes with dicyclohexylborane gives 1-trimethylsilylvinylboranes regio- and stereoselectively whose successive treatment with methyllithium, cuprous iodide and alkyl halides affords (Z)-1,2-dialkylvinylsilanes in high yields. Functionalized 1-trimethylsilyl-1-alkynes give analogous results. Successive treatment of the intermediary 1-trimethylsilylvinylboranes with
1-三甲基甲硅烷基-1-炔烃与二环己基硼烷的氢硼化可选择性和立体选择性地生成1-三甲基甲硅烷基乙烯基硼烷,用甲基锂,碘化亚铜和卤代烷进行连续处理可高产率地获得(Z)-1,2-二烷基乙烯基硅烷。功能化的1-三甲基甲硅烷基-1-炔烃产生相似的结果。用甲基锂和甲基碘连续处理中间的1-三甲基甲硅烷基乙烯基硼烷,得到2-三甲基甲硅烷基-2(Z)-烯烃。烯丙基卤化物类似地得到4-三甲基甲硅烷基-1,4(Z)-链二烯。