APYL BIS(2-OXO-3-BENZOXAXOLINYL) PHOSPHINATE AND TRIS(2-OXO-3-BENZOXAZOLINYL) PHOSPHINE OXIDE : NEW CONDENSING REAGENTS FOR BETA-LACTAM FORMATION FEOM BETA-AMINO ACIDS

Abstract

Beta-lactam compounds including the penam, a basic skeleton of penicillins, are conveniently prepared by the dehydration of β-amino acids using new condensing reagents which are titled.