摘要:
The chiral synthons 1(a-d) were submitted to boron-mediated asymmetric alder condensation with acetaldehyde and benzaldehyde providing, in high diastereomeric excess (>95%), R,R-configured aldols 2(a-f) which are useful intermediates to enantiomerically pure beta-hydroxy-alpha-amino acids. (C) 2000 Elsevier Science Ltd. All rights reserved.