Applications of 4,4‘-(Me3Si)2-BINAP in Transition-Metal-Catalyzed Asymmetric Carbon−Carbon Bond-Forming Reactions
摘要:
A recently developed BINAP derivative with trimethylsilyl substituents on the 4- and 4 '-positions of the binaphthyl skeleton, 2,2 '-bis-(diphenylphosphino)-4,4 '-bis(trimethylsilyl)-1,1 '-binaphthyl (tms-BINAP), was used in a variety of transition-metal-catalyzed asymmetric carbon-carbon bond-forming reactions. In pi-allylpalladium-mediated reactions, tms-BINAP gave better enantioselectivity than the unsubstituted BINAP, and the origin of the improved enantioselectivity was gained from an X-ray structural study of [Pd(eta(3)-C3H5)((R)-tms-BINAP)]CIO4.
Mesoporous Silica Nanosphere Supported Ruthenium Catalysts for Asymmetric Hydrogenation
作者:David J. Mihalcik、Wenbin Lin
DOI:10.1002/anie.200705656
日期:2008.8.4
Remarkable 4,4′-Substituent Effects on Binap: Highly Enantioselective Ru Catalysts for Asymmetric Hydrogenation ofβ-Aryl Ketoesters and Their Immobilization in Room-Temperature Ionic Liquids