Penicillin G → 7-Aminocephalosporanic acid

Beteiligte Stoffe

Reaktionsschritte

In an iminohalide/iminoether reaction for converting amido groups to amino groups present on a penicillin or cephalosporin selected from the group consisting of penicillin V, penicillin G, cephalosporin C, 6-chloracetamidopenicillanic acid, N-[2,2-diethoxycarbonylvinyl(1)]cephalosporin C, N-[2-nitro-2-carbethoxyvinyl(1)]cephalosporin C, 7-[N-(2,2-diethoxycarbonyl)vinyl]adipinoylamino-3-[(1-methyl-1,2,3,4-tetrazol-5-yl)thiomethyl]ceph-3-em-4-carboxylic acid, 7-[N-(2,2-diethoxycarbonyl)vinyl]adipinamido-3-[(2,5-dihydro-6-hydroxy-5-oxo-2-methyl-1,2,4-triazin-3-yl)thiomethyl]ceph-3-em-4-carboxylic acid, 7-[N-(2,2-diethoxycarbonyl)vinyl]adipinamido-3-[(4,5-dihydro-6-hydroxy-5-oxo-4-methyl-1,2,4-triazin-3-yl)thiomethyl]ceph-3-em-4-carboxylic acid, 3-desacetoxy-3-(1-methyl-1,2,3,4-tetrazol-5-yl)thiocephalosporin C, 3-desacetoxy-3-(2,5-dihydro-6-hydroxy-5-oxo-2-methyl-1,2,4-triazin-3-yl)thiocephalosporin C, 3-desacetoxy-3-(4,5-dihydro-6-hydroxy-5-oxo-4-methyl-1,2,4-triazin-3-yl)thiocephalosporin C, 7-phenoxyacetamido-3-methylceph-3-em-4-carboxylic acid, 7-chloracetamido-3-methylceph-3-em-4-carboxylic acid, 7-phenylacetamido-3-methylceph-3-em-4-carboxylic acid, N-ethoxycarbonylcephalosporin C, N-methoxycarbonylcephalosporin C, N-isobutoxycarbonylcephalosporin C, N-iso-propyloxycarbonylcephalosporin C, N-(N'-butylcarbamoyl)cephalosporin C, N-(N'-phenylcarbamoyl)cephalosporin C, N-chloracetylcephalosporin C, or 7-benzylamino-3-methylceph-3-em-4-carboxylic acid; to prepare an amino-compound of formula I, ##STR11## in which X is a group of formula II or IIa, ##STR12## in which R1 is methyl, methoxy, halogen, acetoxymethyl or --CH2 --S-heterocyclic, and esters and salts thereof,

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