Selective Hydrosilylation of 1-Alkynes Using Iridium Catalyst with Biphosphinine Ligand
作者:Yoshihiro Miyake、Eigo Isomura、Masahiko Iyoda
DOI:10.1246/cl.2006.836
日期:2006.8
The iridium-catalyzed hydrosilylation of alkynes in the presence of 4,4′,5,5′-tetramethylbiphosphinine (tmbp) has been explored. The hydrosilylation of alkynes in the presence of tmbp proceeds effectively to give β-(E)-vinylsilanes highly selectively in moderate to high yields, whereas a similar hydrosilylation in the absence of tmbp produces β-(Z)-vinylsilanes selectively. The stereoselectivity of these reactions suggests the importance of the electron-withdrawing properties of tmbp coordinated to iridium.
我们探索了在 4,4′,5,5′-四甲基二膦(tmbp)存在下铱催化的炔烃氢硅化反应。在有 tmbp 存在的情况下,炔烃的氢硅化反应能有效地进行,从而以中等到较高的产率高选择性地生成 β-(E)-乙烯基硅烷,而在没有 tmbp 存在的情况下,类似的氢硅化反应则能选择性地生成 β-(Z)-乙烯基硅烷。这些反应的立体选择性表明了与铱配位的 tmbp 的吸电子特性的重要性。