selective acetylation of racemic 1-[6-(1-hydroxyethyl)-pyridin-2-yl]ethanone rac-2 to yield alcohol (S)-2 and acetate (R)-3. Acetylation of a diastereomeric mixture of racemic and meso-2,6-bis(1-hydroxy-ethyl)pyridine, rac/meso-4, with the most selective Novozym 435 lipase in vinyl acetate resulted in a mixture of enantiopure diol (S,S)-4, monoacetate (R,S)-5 and diacetate (R,R)-6. Hydrolysis of the
An efficient preparation of optically pure C2-symmetric aromatic diols by the asymmetric reduction of diacylaromatic compounds with B-chlorodiisopinocampheylborane
作者:P.Veeraraghavan Ramachandran、Guang-Ming Chen、Zhi-Hui Lu、Herbert C. Brown
DOI:10.1016/0040-4039(96)00708-3
日期:1996.5
Asymmetricreduction of diacylaromaticcompounds with B-chlorodiisopinocampheylborane provides the product diols in excellent diastereomeric and enantiomeric purity.