Hydrosilylation of alkynes catalysed by trans- di-µ-hydrido-bis(tertiary phosphine)bis(silyl)diplatinum complexes
作者:Michael Green、John L. Spencer、F. Gordon A. Stone、Constantinos A. Tsipis
DOI:10.1039/dt9770001525
日期:——
diphenylacetylene undergo hydrosilylation in 70–90% yield using diplatinum complexes [Pt(SiR3)(µ-H)[(C6H11)3P]}2][SiR3= Si(CH2Ph)Me2, SiCl3, or SiEtMe2] as catalysts. Many of the reactions proceed exothermically after initial warming of the reactants. The stereochemistry of the products from but-1-yne, phenylacetylene, and but-2-yne has been established by 1H n.m.r. spectroscopy. Hydrosilylation of but-1-yne and
使用二铂配合物[Pt(SiR 3)(µ-H)[(C 6 H 11)3 P]可以使But-1-yne,苯乙炔,but-2-yne和二苯乙炔以70-90%的产率进行氢化硅烷化。2 ] [SiR 3= Si(CH 2 Ph)Me 2,SiCl 3或SiEtMe 2 ]作为催化剂。在最初加热反应物后,许多反应放热地进行。通过1 H nmr光谱已经建立了丁-1-炔,苯乙炔和丁-2-炔的产物的立体化学。丁-1-炔和苯乙炔的氢化硅烷化提供了主要产物反式-EtCH CHSiR3 [SiR 3= SiMe 2 Ph,SiEt 3,SiCl 3,SiCl 2 Me,SiClMe 2和Si(OEt) 3 ]和反式-PhCHCHSiR 3分别对应于顺式-SiH的添加。少量形成对应于非末端加成的产物,而对于苯乙炔和氯硅烷则完全不形成。如对顺式添加所预期的那样,但是丁-2-炔基给出乙烯基硅烷顺式-McCHC(Me)(SiR