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 |
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Authors: | Gabriella Brunetto Susanna Gori Rita Fiaschi Elio Napolitano |
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Abstract: | (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. |
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