CLEAVAGE OF THE 5-AMINO-5-CARBOXY-2-OXAPENTANOYL SIDE-CHAIN FROM ENZYMATICALLY SYNTHESIZED PENICILLINS AND CEPHALOSPORINS
- Both 5R- and 5S-5-amino-5-carboxy-2-oxapentanoyl side chains can substitute for the L-δ-α-aminoadipoyl side chain in the isopenicillin N synthase catalysed formation of penicillins from tripeptides. The 5R- side chain analogue can be cleaved from penicillins and cephalosporins by treatment with D-amino acid oxidase followed by oxidative decarboxylation and decarboxylative elimination. © 1995.
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