摘要:
A compound of formula I or a physiologically acceptable salt thereof
wherein X represents sulphur or methylene, R, represents hydrogen, amino or an acylated or carbamylated amino group, R 2 represents hydrogen or an alkyl group and R 3 represents an alkoxy group; preparation thereof by subjecting a tripeptide of formula III, to the action of the enzyme isopenicillin N synthethase, and the tripeptide of formula III.
摘要:
Penicillin G and analogous penicillins with arylacylamido side chains can be produced by the action of cyclase on PCV, POCV, or appropriate analogue thereof.
摘要:
6β-(L-α-Aminoadipoyl)-2α-vinyl-2β-methylpenam-3-carboxylic acid is provided in an enzymatic process converting δ-(L-α-aminoadipoyl)-L-cysteinyl-D-γ,δ-didehydroisoleucine with isopenicillin N synthetase. The 2α-vinylpenam product is converted by known methods to the 6β-amino-2α-vinyl-2β-methylpenam-3-carboxylic acid nucleus and the latter is N-acylated to provide corresponding 6β-acylaminopenams.
摘要:
Penicillin G and analogous penicillins with arylacylamido side chains can be produced by the action of cyclase on PCV, POCV, or appropriate analogue thereof.
摘要:
Penicillin G and analogous penicillins with arylacylamido side chains can be produced by the action of cyclase on PCV, POCV, or appropriate analogue thereof.