(Aminomethyl)pyridine Complexes for the Cobalt‐Catalyzed Anti‐Markovnikov Hydrosilylation of Alkoxy‐ or Siloxy(vinyl)silanes with Alkoxy‐ or Siloxyhydrosilanes
作者:Kangsang L. Lee
DOI:10.1002/anie.201612460
日期:2017.3.20
Cobalt‐catalyzed anti‐Markovnikov reactions that involve siloxy‐ or alkoxy(vinyl)silanes and siloxy‐ or alkoxyhydrosilanes are disclosed. More than 25 new cobalt–(aminomethyl)pyridine complexes were developed as catalysts for the hydrosilylation of industry‐relevant and challenging siloxy‐ or alkoxy‐terminated vinylsilanes. These transformations typically proceed in the presence of 0.25 mol % of the
公开了涉及甲硅烷氧基或烷氧基(乙烯基)硅烷和甲硅烷氧基或烷氧基氢硅烷的钴催化抗马尔科夫尼科夫反应。已开发出超过25种新型钴-(氨基甲基)吡啶配合物,作为与行业相关的和具有挑战性的甲硅烷氧基或烷氧基封端的乙烯基硅烷进行氢化硅烷化的催化剂。这些转化通常在0.25 mol%的钴配合物和0.75 mol%的烷基化剂存在下进行,以在30分钟内提供高达98%的收率和> 98%的抗马尔科夫尼科夫选择性的所需产物。当前的协议显示了广泛的底物范围,可提供超过25个在两个末端均带有甲硅烷氧基或烷氧基官能团的硅氧烷,也可应用于聚合的乙烯基和氢硅氧烷。