FORFARANDE FOR FRAMSTELLNING AV 7 BETA-AMINO-CEFEM-4-KARBOXYLSYRAFORENINGAR GENOM DEKARBONYLERING AV EN 3-FORMYL-CEFEM-4-KARBOXYLSYRAFORENING

摘要

The invention concerns the decarbonylation of the formyl group in 7-amino-3-formyl-ceph-2-em-4-carboxylic acid compounds and 7-amino-3-formyl-ceph-3-em-4-carboxylic acid compounds by treatment with a platinum metal complex capable of taking up carbon monoxide. Also included are the 7-amino-ceph-2-em-4-carboxylic acid compounds and the 1-oxides of 7-amino-ceph-3-em-4-carboxylic acid compounds; these compounds are used as intermediates.