nitrenium (NHN) salts, the analogues of N-heterocyclic carbenes, have attracted considerable interest. However, relatively little is known about their catalytic ability beyond their Lewis acid catalysis. Herein, we describe that NHNs can serve as catalytic electron acceptors for charge transfer complex photoactivations. We showcase that, under blue light irradiation, the NHN salts could catalyze the
Pd-Catalyzed Dynamic Kinetic Enantioselective Arylation of Silylphosphines
作者:Vincent S. Chan、Robert G. Bergman、F. Dean Toste
DOI:10.1021/ja076457r
日期:2007.12.1
Palladium-catalyzed cross-couplings represent a powerful method for the formatioil of new bonds. A catalytic, enantioselective P-C bond-forming reaction proceeding via a Pd-mediated arylation of silylphosphines was developed for the synthesis of P-stereogenic phosphines. These useful and synthetically challenging phosphines can be made with a variety of functionalized aryl iodides; however, they proceed most enantioselectively with 2-iodo-N ,N -diisopropylbenzamides.