New Routes to Chiral Evans Auxiliaries by Enzymatic Desymmetrisation and Resolution Strategies
作者:Claudia Neri、Jonathan M. J. Williams
DOI:10.1002/adsc.200303006
日期:2003.6
synthesis using racemic auxiliaries and an enzymatic resolution. Desymmetrisation of N-Boc-protected serinol has been achieved in good yield and high enantiomeric excess using porcine pancreas lipase. This has been exploited in different ways to prepare enantiomerically enriched (4R)- and (4S)-substituted 2-oxazolidinones. In another approach to asymmetric synthesis, starting from a racemic Evans auxiliary