Proline−β<sup>3</sup>-Amino-Ester Dipeptides as Efficient Catalysts for Enantioselective Direct Aldol Reaction in Aqueous Medium
作者:Mauro De Nisco、Silvana Pedatella、Hidayat Ullah、Javid H. Zaidi、Daniele Naviglio、Özgür Özdamar、Romualdo Caputo
DOI:10.1021/jo902106r
日期:2009.12.18
β3-l-amino acids are reported to catalyze enantioselectivedirectaldolreaction in aqueousmedium, leading to significant anti:syn diastereomeric ratios and enantiomeric excesses. The simple introduction of a polar substituent at the C-2 position of the β3-l-amino acid was also found to enhance appreciably both diastereo- and enantioselectivity of the catalyst.