EfficientenantioselectiveNHinsertionreactions of secondary and primary anilines were catalyzed by palladium(0) in combination with chiral guanidine derivatives. A broad range of substituted anilines were tolerated, and the corresponding products were obtained in high yield (up to 99 %) with good enantioselectivity (up to 94 % ee) under mild reaction conditions. The NHinsertion mechanism was
Enantioselective insertion of carbenoids into N–H bonds catalyzed by chiral bicyclobisoxazoline copper(I) complexes
作者:Paul Le Maux、Gérard Simonneaux
DOI:10.1016/j.tet.2015.10.009
日期:2015.12
Chiral copper(I)-bicyclobisoxazoline complexes were found to catalyze the insertion of α-diazocarbonyl compounds into N–H bonds of aniline derivatives. The insertion reactions proceeded with high yields (78–99%) and enantioselectivities of up to 81% for the different α-diazopropionates. A predominant effect of the nature and the position of the substituents on the enantiocontrol of the reaction was