Rhodium-Catalyzed Asymmetric Addition of Potassium Organotrifluoroborates to<i>N</i>-Sulfonyl Ketimines
作者:Ryo Shintani、Momotaro Takeda、Ying-Teck Soh、Tomoaki Ito、Tamio Hayashi
DOI:10.1021/ol200958q
日期:2011.6.17
A rhodium-catalyzed asymmetric addition of readily available potassium organotrifluoroborates to both N-tosyl and N-nosyl ketimines has bean developed. High enantioselectivity has been achieved by using a chiral diene ligand, and the nosyl group of the addition products can be easily removed while retaining the enantiomeric purity.