Crystallization-Induced Asymmetric Transformations. Enantiomerically pure (−)-(R)- and (+)-(S)-2,3-Dibromopropan-1-ol and Epibromohydrins. A Study of Dynamic Resolution via the Formation of Diastereoisomeric Esters
作者:Gabriella Brunetto、Susanna Gori、Rita Fiaschi、Elio Napolitano
DOI:10.1002/1522-2675(200211)85:11<3785::aid-hlca3785>3.0.co;2-a
日期:2002.11
(S)-2,3-Dibromopropan-1-ol of high enantiomer excess was obtained by crystallization-induced asymmetric transformations of racemic 2,3-dibromopropan-1-ol esterified with N-([1,1'-biphenyl]-4-ylcarbonyl-L-alanine; in particular, an asymmetric transformation of the first type (involving bromide exchange to equilibrate the diastereoisomeric esters) and an asymmetric transformation of the second type (involving a transesterification of diastereoisomeric esters with excess racemic alcohol) were devised.