Stereodivergent Formation of Alkenylsilanes:syn oranti Hydrosilylation of Alkynes Catalyzed by a Cyclopentadienylcobalt(I) Chelate Bearing a Pendant Phosphane Tether
作者:Li Yong、Karin Kirleis、Holger Butenschön
DOI:10.1002/adsc.200606028
日期:2006.5
alkynes is catalyzed by the di-tert-butylphosphanylethylcyclopentadienylcobalt chelate 1. While the reaction of internal alkynes exclusively affords syn hydrosilylation products with triethylsilane, the reaction with triethoxysilane shows predominant anti stereoselectivity. Reactions of terminal alkynes are less selective with triethylsilane and result in cyclotrimerization when triethoxysilane is used
炔烃的氢化硅烷化反应是由二叔丁基膦烷基乙基环戊二烯基钴螯合物1催化的。虽然内部炔烃的反应仅提供与三乙基硅烷的合成氢化硅烷化产物,但与三乙氧基硅烷的反应显示出主要的抗立体选择性。末端炔烃与三乙基硅烷的反应选择性较低,使用三乙氧基硅烷时会导致环三聚。