Abstract:
Fourteen novel title compounds were. designed and synthesized through cyclocondensation, deprotection, acylation and oxidative reactions. Their chemical structures were identified by elemental analysis, IR and mass spectra. The cis-configuration of these beta-lactams were determined by coupling constants in 360 MC
1HNMR spectra.The inhibition activities of these compounds to acetobacter beta-lactamase were testedprcliminarily. Eleven of them exhibited marked activities. Among them, the inhibiting activities of Ⅲe-1 and Ⅲg-1 are twice as that of sulbactam.