Aryl- and alkenylsilanediols, which possess two hydroxy groups on the silicon atom, undergo the rhodium-catalyzed addition of an organic group on silicon to internal alkynes. Treatment of several internal alkynes with aryl- or alkenylsilanediols in the presence of 3 mol% of [Rh(OH)(cod)]2 affords the hydroarylated or hydroalkenylated products in good yields. A crucial role of the hydroxy group of silanediol for the catalytic reaction is also discussed with the related aryltin reagent.
芳基和烯基
硅二醇在
硅原子上具有两个羟基,在
铑催化下,
硅上的有机基团与内部
炔烃发生加成反应。在 3 mol% 的 [Rh(OH)(cod)]2 存在下,用芳基或烯基
硅烷二醇处理几种内部
炔烃,可以得到羟基化或氢化烯基产物,而且收率很高。此外,还讨论了
硅烷二醇的羟基在催化反应中的关键作用以及相关的芳基
锡试剂。