combination of a new bifunctional phosphine and an acrylate generate a zwitterion in situ and it serves as an efficient catalyst for asymmetric reactions through a homogeneous ion‐pairing mode. This new catalytic system has been successfully applied to Mannich‐typereactions to give excellent results and it demonstrates a broad substrate scope. Such reactivity is not accessible with general organophosphine catalytic
Organocatalytic Highly Enantioselective Mannich-Type Reactions of Fluoromalonate with N-Boc-Aldimines
作者:Dae Kim、Ju Lee
DOI:10.1055/s-0029-1218736
日期:2010.6
The catalytic enantioselective Mannich reaction promoted by chiral bifunctional organocatalysts is described. The treatment of diethyl fluoromalonate with N-Boc-aldimines under mild reaction conditions afforded the corresponding β-amino-β-fluoromalonates with excellent enantioselectivity (93-97% ee).