A new stereoselective approach to β-hydroxy-α-aminoacids and dipeptides
摘要:
The chiral synthons 1, 2 and 1' were submitted to aldol condensation to achieve both beta-hydroxy-alpha-aminoacids and dipeptides. The configuration of the new stereogenic centers was assigned on the basis of H-1 NMR spectroscopic data. (C) 1999 Elsevier Science Ltd. All rights reserved.
Highly stereocontrolled boron-mediated synthesis of β-hydroxy-α-amino acids and dipeptides. Part 2
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.