K. Higashiyama et al., DIASTEREOSELECTIVE ADDITION OF SILYL ENOL ETHER TO CHIRAL IMINES AND 1,3-OXAZOLIDINES USING A LEWIS-ACID, Synlett, (5), 1998, pp. 489
The Lewis acid promoted reaction of silyl enol ether to chiral imines
and 1,3-oxazolidines derived from (R)-phenylglycinol afforded with goo
d diastereoselectivity the (R,R)-beta-amino ester derivatives from the
imines, and the (R,S)-beta-amino ester derivatives from the 1,3-oxazo
lidines.