ASYMMETRIC-SYNTHESIS OF MONOCYCLIC BETA-LACTAMS - APPLICATION OF IMINES DERIVED FROM CHIRAL N-PROTECTED ALPHA-AMINO ALDEHYDES IN THE STAUDINGER REACTION
Imines derived from N,O-diprotected L-serinal upon treatment with acid chlorides in the presence of triethylamine furnished beta-lactams with complete level of reaction diastereoselection.