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.
6β-(L-α-Aminoadipoyl)-2α-vinyl-2β-methylpenam-3-carboxylic acid(6β-(L-α-
氨基己二酰)-L-cysteinyl-D-γ,δ-didehydroisoleucine)在异青霉烯 N 合成酶的酶解过程中转化而来。 2α-vinylpenam 产物通过已知方法转化为 6β-amino-2α-vinyl-2β-methylpenam-3-carboxylic acid(6β-
氨基-2α-
乙烯基-2β-甲基亚麻酰胺-3-
羧酸)核,后者经 N-酰化可得到相应的 6β-acylaminopenams(6β-
氨基亚麻酰胺)。