Organolanthanide catalyzed hydrogenation and hydrosilylation of substituted methylenecycloalkanes
作者:Gary A. Molander、Jo¨rn Winterfeld
DOI:10.1016/s0022-328x(96)06276-6
日期:1996.11
This communication presents a study of the scope of the catalytic hydrogenation and hydrosilylation of chiral exomethylene-substituted cyclopentanes and cyclohexanes utilizing the organolanthanide precatalysts Cp2 LnCH(SiMe3)2 (CpC5Me5; LnSm, Yb). Both reaction types are sterically driven and lead to thecis-diastereomer as the major product. Additionally, the hydrosilylation is regiospecific, the silane
该交流介绍了利用有机镧系元素预催化剂Cp 2 LnCH(SiMe 3)2(CpC 5 Me 5 ; LnSm,Yb)对手性异亚甲基取代的环戊烷和环己烷进行催化加氢和硅氢加成反应的范围的研究。两种反应类型都是空间驱动的,并导致以顺式-非对映异构体为主要产物。另外,氢化硅烷化是区域特异性的,硅烷仅位于双键的末端位置。