Synthesis and β-lactamase inhibitory evaluation of novel 6α-halo-2β-chloromethyl-2α-methylpenam-3α-carboxylic acids and their sulfones and 6α-halo-2β-mercaptobenzothiazolylmethyl-2α-methylpenam-3α-carboxylic acids
1995
Abstract The synthesis and the inhibitory activity against β-lactamase I from Bacillus cereus is described for a new series of 6α-bromo, chloro or fluoro-2β-chloromethyl-2α-methylpenam-3α-carboxylic acids ( 5a-c ) and their corresponding sulfones 6a-c and 6α-bromo, chloro or fluoro-2β-mercaptobenzothiazolylmethyl-2α-methylpenam-3α-carboxylic acids ( 8a-c ). Among the novel compounds, the highest activity was expressed by 6α-chloro-2β-chloromethyl-2α-methylpenam-3α-carboxylic acid 1,1-dioxide ( 6b ).
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