Asymmetric Reduction of Prochiral Ketones with <i>N</i>‐Sulfonylated Amino Alcohols as Catalysts
作者:Zhongqiang Zhou、Yajing Guo
DOI:10.1080/00397910701818586
日期:2008.2.13
Abstract Novel N‐sulfonylated amino alcohols were synthesized from L‐amino acids and (+)‐camphor, and their application to asymmetricreduction of prochiralketones with NaBH4–BF3 · Et2O is described.
Enantioselective addition of diethylzinc to aldehydes catalyzed by chiral amino alcohols. Substituent effect and nonlinear effect
作者:Takahiko Ohga、Satoshi Umeda、Yasuhiro Kawanami
DOI:10.1016/s0040-4020(01)00423-9
日期:2001.6
series of chiralβ-aminoalcohols derived from (S)-leucine, valine, and phenylalanine have been synthesized and evaluated as chiral catalysts for the enantioselective addition of diethylzinc to aldehydes. The β-aminoalcohol (1c) possessing a isobutyl substituent and two phenethyl substituents on the carbinol carbon atom was found to be an efficient and optimal ligand to catalyze the diethylzinc addition