C-(α-d-Glucopyranosyl)-phenyldiazomethanes-irreversible inhibitors of α-glucosidase.

Several C-(α-d-glucopyranosyl)-phenyldiazomethanes, with different substituent groups at the para-position of the phenyl ring, were prepared. The stabilities of these diazo compounds were investigated through NMR and UV monitoring. The para-cyano substituted diazo compound was found to be stable in neutral media (pH 7.0 buffer) and could be isolated. Inhibitory activity investigations indicated that this compound is an irreversible inhibitor against α-glucosidase from Saccharomyces cerevisiae.