Substituted aryl malonamates as new serine beta-lactamase substrates: structure-activity studies.

Bioorganic & Medicinal Chemistry
S A AdediranR F Pratt

Abstract

A series of substituted aryl malonamates have been prepared. These compounds are analogues of aryl phenaceturates where the amido side chain has been replaced by a retro-amide. Like the phenaceturates, these compounds are substrates of typical class A and class C beta-lactamases, particularly of the latter, and of soluble DD-peptidases. The effect of substituents alpha to the ester carbonyl group on turnover by these enzymes is similar to that in the phenaceturates. On the other hand, N-alkylation of the side chain amide of malonamates, but not of phenaceturates, retains the susceptibility of the compounds to hydrolysis by beta-lactamases. This reactivity is not enhanced, however, by bridging the amide nitrogen and Calpha atoms. A phosphonate analogue of the malonamates was found to be an irreversible inhibitor of the beta-lactamases. These results, therefore, provide further evidence for the covalent access of compounds bearing retro-amide side chains to the active sites of beta-lactam-recognizing enzymes.

References

Sep 1, 1982·Antimicrobial Agents and Chemotherapy·K Jules, H C Neu
Jun 5, 2003·Biochemistry·D CabaretM Wakselman

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Citations

Aug 13, 2011·Chemical Reviews·Vellaisamy SridharanJ Carlos Menéndez
Sep 21, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jan ZitkoMartin Doležal
Jun 30, 2019·Journal of Medicinal Chemistry·Jisook LeePeter J Scammells

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