Regio- and stereoselective synthesis of (Z)-β-silylalkenylboranes by silaboration of alkynes catalyzed by palladium and platinum complexes
作者:Michinori Suginome、Takanori Matsuda、Hiroshi Nakamura、Yoshihiko Ito
DOI:10.1016/s0040-4020(99)00444-5
日期:1999.7
Addition of the silicon-boron bonds of (dimethylphenylsilyl)boranes having pinacol, catechol, and diethylamino groups on the boron across carbon-carbon triple bonds is effectively catalyzed by palladium complexes. The silaboration of a variety of terminal alkynes took place with almost complete regio- and stereoselectivity to afford (Z)-1-boryl-2-silylalkenes in high yields. The silaboration products
钯配合物可有效地催化硼上具有频哪醇,邻苯二酚和二乙氨基的(二甲基苯基甲硅烷基)硼烷的硅-硼键跨碳-碳三键的加成。各种末端炔的硅烷化反应几乎完全实现了区域和立体选择性,从而以高收率提供了(Z)-1-硼基-2-甲硅烷基烯烃。将硅烷化产物与芳基碘化物和铑催化的共轭物加到甲基乙烯基酮中进行钯催化的交叉偶联反应,分别以高收率得到β-甲硅烷基苯乙烯衍生物和δ-甲硅烷基-γ,δ-不饱和酮。 。