PROCESS FOR OBTAINING OXAZOLINO-AZETIDINE DERIVATIVES

摘要

PURPOSE:Oxazolinoazetidine compund I(COM is carboxy,protected carboxy; R is H, alkyl, aryloxyalkyl, aralkyl, ary; X is H, a nucleopilic group); e. g. alpha-(3phenyl-7-oxo-4-oxa-2,6-diazabicyclo[3,2,0]hept-2-en-6-yl)-alph a-isopropenyl acetic acid diphenylmethyl ester.