Lipase-Catalyzed Kinetic Resolution of the Racemic Mixtures of 1-Aryloxy-3-Nitrato-and 1-Aryloxy-3-Azido-2-Propanols
作者:Beata Pchelka、Justyna Radomska、Jan Plenkiewicz
DOI:10.1080/00397919808004470
日期:1998.12
Abstract The racemicmixtures of 1-aryloxy-3-nitrato-2-propanols and 1-aryloxy-3-azido-2-propanols were resolved with moderate selectivity by the lipase-mediated acylation with vinyl acetate. The effects of the nature, position, and spatial requirements of the phenyl-ring substituents on the resolution degree were investigated.
Both (R)- and (S)-enantiomers of 3-aryloxy-1-nitrooxypropan-2-ols (R)-(-)-1, (S)-(+)-2 were prepared in high enantiomeric excess by lipase from Pseudomonas cepacia (Amano PS) or Pseudomonas fluorescens (Amano AK)-catalyzed acetylation of racemic alcohols la-g with vinyl acetate in n-hexane at 4 or 22 degreesC. The enantio selectivity of this transformation was dependent on the substitution pattern of the aryl ring with E-values ranging from 31 to 111. (C) 2001 Elsevier Science Ltd. All rights reserved.