Asymmetric halogenation of chiral imide enolates. A general approach to the synthesis of enantiomerically pure α-amino acids.
作者:David A Evans、Jon A Ellman、Roberta L Dorow
DOI:10.1016/s0040-4039(00)95305-x
日期:1987.1
The chiral N-acyl oxazolidones 2, as the derived dibutyl boron enolates, have been demonstrated to undergo diastereoselective bromination and subsequent azide displacement to give the α-azido carboximides 4a (5 cases). These adducts may be hydrolyzed under mild conditions to the enantiomerically pure α-azido carboxylic acids 5a.