摘要:
The stereocontrolled nucleophilic addition of lithium trimethylsilyl acetylide to the N-benzyl nitrone (BIGN) derived from 2,3-O-isopropylidene-D-glyceraldehyde, followed by oxidative cleavage of the ensuing propargyl hydroxylamines resulted in an efficient stereodivergent synthesis of fully protected epimeric N-hydroxy alpha-amino esters 8 and 13 as well as the corresponding cw-amino esters 9 and 14. (C) 1997 Published by Elsevier Science Ltd.