Bicyclic Bridgehead Phosphoramidite (Briphos) Ligands with Tunable π-Acceptor Ability and Catalytic Activity in the Rhodium-Catalyzed Conjugate Additions
作者:Ansoo Lee、Seihwan Ahn、Kyungjun Kang、Min-Seob Seo、Yeonjoon Kim、Woo Youn Kim、Hyunwoo Kim
DOI:10.1021/ol502772m
日期:2014.10.17
A new type of bicyclic bridgehead phosphoramidites (briphos) is reported, where the geometrical constraints significantly enhance the pi-acceptor ability compared with its monocyclic analogs. The briphos is shown to be highly efficient and tunable for Rh(I)-catalyzed conjugate additions of aryl boronic acids to alpha,beta-unsaturated ketones and N-tosyl ketimines.