Directing Group-Controlled Hydrosilylation: Regioselective Functionalization of Alkyne
作者:Yuuya Kawasaki、Youhei Ishikawa、Kazunobu Igawa、Katsuhiko Tomooka
DOI:10.1021/ja209553f
日期:2011.12.28
hydrosilylation of unsymmetric alkynes proceeds in a highly regioselective manner with a dimethylvinylsilyl (DMVS) group as the directing group. This hydrosilylation affords a single regioisomer of silylalkenes from propargylic and homopropargylic alcohol derivatives. DMVS also has an accelerating effect that allows group-selective hydrosilylation of the DMVS-attached alkyne prior to that of other alkynes. Combined
Pt(0) 催化的不对称炔烃的氢化硅烷化以二甲基乙烯基甲硅烷基 (DMVS) 基团作为导向基团以高度区域选择性的方式进行。这种氢化硅烷化从炔丙醇和高炔丙醇衍生物提供了单一的甲硅烷基烯烃区域异构体。DMVS 还具有加速作用,允许连接 DMVS 的炔烃先于其他炔烃进行基团选择性氢化硅烷化。所得甲硅烷基烯烃的组合氢化硅烷化和转化反应从不对称炔烃提供具有高区域选择性的各种三取代烯烃和多氧官能化化合物。