Cobalt-Catalyzed (<i>E</i>)-Selective<i>anti</i>-Markovnikov Hydrosilylation of Terminal Alkynes
作者:Caizhi Wu、Wei Jie Teo、Shaozhong Ge
DOI:10.1021/acscatal.8b01410
日期:2018.7.6
regioselective and stereoselective hydrosilylation of terminal alkynes with catalysts generated from bench-stable Co(acac)2 and bisphoshpine ligands. The cobalt catalyst precursors are activated by the reaction with hydrosilanes, and air-sensitive activators, such as Grignard reagents or NaBHEt3, are not required for catalyst activation. A wide range of aromatic and aliphatic terminal alkynes underwent this
我们报告了末端炔烃的区域选择性和立体选择性氢化硅烷化与由板凳稳定的Co(acac)2和双膦吡啶配体生成的催化剂。钴催化剂前体通过与氢硅烷的反应而活化,并且催化剂活化不需要空气敏感性活化剂,例如格氏试剂或NaBHEt 3。钴催化的氢化硅烷化使各种芳族和脂族末端炔烃发生,从而以高收率和高区域选择性和立体选择性提供了相应的(E)-乙烯基硅烷。这些反应显示出良好的官能团相容性,无需干燥箱即可轻松放大至克级。氘标记实验提示顺式-将氢硅烷添加到炔烃中。