Intermediates for the preparation of ceftazidine, and process for their preparation.

摘要

(6R, 7R)-7-[(Z)-2-(2-triphenylmethylaminothiazol-4-yl)-2-(2-tert.-butoxycar bonylprop-2-oxyimino)ac etamido]-3-(1-pyridiniummethyl)ceph-3-em-4-carboxylate is isolated and purified by formation of a N,N-dimethylacetamide solvate.