A new class of recoverable chiral sulphoxide: Application to the asymmetric synthesis of β-hydroxy esters.
作者:Martin Wills、Roger J. Butlin、Ian D. Linney
DOI:10.1016/s0040-4039(00)79112-x
日期:1992.9
Enantiomericallypure cyclic sulphinadime S(S)R-(+)-2 was prepared fromhomochiral sulphinic acid R-(−)-1 and subsequently converted to the ester S(S)R-(−)-3 via ring opening with an ester enolate. Aldol reactions of S(S)R-(−)-3 with aromatic aldehydes gave, with one exception, aldol products4 in high diastereoisomeric excess. Reductive cleavage of the aldol adducts4 gave β-hydroxy esters5 in high