Phase-Transfer-Catalyzed Enantioselective Mannich Reaction of Malonates with α-Amido Sulfones
作者:Francesco Fini、Luca Bernardi、Raquel P. Herrera、Daniel Pettersen、Alfredo Ricci、Valentina Sgarzani
DOI:10.1002/adsc.200600250
日期:2006.10
The highly enantioselectivereaction between in situ generated, Cbz-protected azomethines and malonates in the presence of 150 mol % of potassium carbonate (50 % w/w) and 1 mol % of quinine-derived quaternary ammonium bromides as phase-transfer organocatalysts has been developed. This study reports a novel approach for the asymmetric Mannich-type reaction and a wide range of azomethines, including