Hydrosilylation of 1,4-Bis(trimethylsilyl)butadiyne and Silyl-Substituted Butenynes
作者:Tetsuo Kusumoto、Kenji Ando、Tamejiro Hiyama
DOI:10.1246/bcsj.65.1280
日期:1992.5
Hydrosilylation of 1,4-bis(trimethylsilyl)butadiyne using various hydridosilanes and Pt(IV), Pt(0), Rh(I) or Pd catalyst gave, depending on catalyst and hydridosilane, 1,1,3,4-tetrasilyl-substituted 1,3-butadienes or 1,1,3,4-tetrasilyl-substitued 1,2-butadienes. Formation of the 1,2-butadienes was proved to be attributable to second hydrosilylation of primary products 1,2,4-trisilyl-1-buten-3-ynes. For the second hydrosilylation a mechanism was proposed that involves silylmetalation induced through a metalacyclopropene intermediate.
1,4-双(三甲基硅基)丁炔与不同的氢硅烷以及Pt(IV)、Pt(0)、Rh(I)或Pd催化剂进行水合硅烷化反应,得到的产物取决于催化剂和氢硅烷,形成了1,1,3,4-四硅基取代的1,3-丁二烯或1,1,3,4-四硅基取代的1,2-丁二烯。形成1,2-丁二烯被证明是由于初级产物1,2,4-三硅基-1-丁烯-3-炔的第二次水合硅烷化。对于第二次水合硅烷化,提出了一种机制,该机制涉及通过金属环丙烯中间体引发的硅金属化反应。