Bis(phosphine)cobalt-Catalyzed Highly Regio- and Stereoselective Hydrosilylation of 1,3-Diynes
作者:Degong Kong、Bowen Hu、Min Yang、Dawei Gong、Haiping Xia、Dafa Chen
DOI:10.1021/acs.organomet.0c00540
日期:2020.12.28
Seven bis(phosphine) cobalt complexes and one tris(phosphine) cobalt complex were tested for hydrosilylation of 1,3-diynes, among which dppp-CoCl2 (1 mol %) exhibited the best regio- and stereoselectivity, affording (E)-2-silyl-1,3-enynes through monohydrosilylation at the internal carbon of the 1,3-diyne unit via syn addition. Good functional tolerance was achieved, 32 substrates were tested, and
测试了7种双(膦)钴配合物和1种三(膦)钴配合物对1,3-二炔的硅氢加成反应,其中dppp-CoCl 2(1 mol%)表现出最佳的区域选择性和立体选择性,得到(E)-通过1,3-二炔单元的内部碳上的单氢化硅烷化,通过顺式加成反应生成2-甲硅烷基-1,3-烯炔。达到了良好的功能耐受性,测试了32种底物,反应可以轻松扩增至克水平。对于大多数底物,可以在室温下5分钟内完成转化。迄今为止,这是用于1,3-二炔选择性氢化硅烷化的最有效的贱金属催化体系。