Alcohol-catalysed Hydrolysis of Benzylpenicillin

Andrew M. Davis, Philip Proctor, Michael I. Page

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


The hydrolysis of benzylpenicillin is catalysed by alkoxide ions and other oxygen bases. Catalysis occurs by a nucleophilic pathway and the intermediate ester can be detected in some cases. The Brønsted βnuc for alkoxide ions is 0.97, and is compatible with rate-limiting ring opening of the β-lactam. A solvent isotope effect of 3.2 for the trifluoroethanol-catalysed reaction suggests protonation by water occurs to the departing β-lactam nitrogen. Penicillin is not a particularly effective acylating agent of alcohols.

Original languageEnglish
Pages (from-to)1213-1217
Number of pages5
JournalJournal of the Chemical Society, Perkin Transactions 2
Issue number8
Publication statusPublished - Aug 1991


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