A series of new chiral ligands derived from D-fructose have been synthesized and applied in the enantioselective addition of diethylzinc to aldehydes. Comparison of the enantioselectivities obtained with these ligands demonstrated that the catalytic properties are highly dependent upon the structure of ligands, a rational explanation of the structural effects on the catalytic properties is provided. (C) 2003 Elsevier Science Ltd. All rights reserved.
Nucleophilic addition-reactions of 1,2:4,5-di-O-isopropylidene-β-d-erythro-2,3-hexodiulo-2,6-pyranose, and the stereo-chemistry of the products
作者:Philippe C.M. Herve Du Penhoat、Arthur S. Perlin