摘要:
Asymmetric aldol reactions of titanium Z-enolates of N-diphenylmethylene derivatives of glycinamides derived from (4S)-2,2-dimethyloxazolidine chiral auxiliaries are highly ul,ul-1,4-inductive. Hydrolytic removal of the chiral auxiliary from the aldol adducts provide optically active anti-isomers of alpha-amino-beta-hydroxy acids with 2R-absolute configuration.