Catalytic asymmetric Mannich-type reactions of fluorinated ketoesters with N-Boc aldimines in the presence of chiral palladium complexes
摘要:
The catalytic enantioselective Mannich reaction promoted by chiral palladium complexes is described. The treatment of alpha-fluoro-beta-ketoesters with N-Boc-aldimines under mild reaction conditions afforded the corresponding beta-aminated alpha-fluoro-beta-ketoesters with excellent enantioselectivities (up to 99% ee). (C) 2011 Elsevier Ltd. All rights reserved.
Asymmetric generation of fluorine-containing quaternary carbons adjacent to tertiary stereocenters: uses of fluorinated methines as nucleophiles
作者:Xiao Han、Jie Luo、Chen Liu、Yixin Lu
DOI:10.1039/b823184b
日期:——
Organocatalytic asymmetric Michael reactions of fluorinatednucleophiles with nitroolefins catalyzed by Cinchona alkaloid-derived thiourea catalysts generated the desired Michael products containing vicinal fluorinated quaternary and tertiary chiral centers with exceptional enantioselectivity.