(N)-triazine-di:one-carboxyl derivs. of amoxycillin - useful as antibiotics against Pseudomonas infections

摘要

Penicillins of formula (I), their salts and esters are new. In (I), Z is O or S. (I) are antibiotics with esp. high activity against Pseudomonas aeruginosa; e.g., (I; Z = O) gives MIC values of 0.5-8 mu g/ml against a large no. of Ps. aeruginosa strains, compared with >= 32 mu g/ml for carbenicillin. Combinations of (I) and amikacin, i.e. L-(-)-alpha-amino-alpha-hydroxybutynyl kanamycin A, in a ratio of 1:2-100 exhibit a synergistic effect in this respect. In an example, (I; Z = O) is prepd. from 1,2,4-triazine-3,5-dione-6-carboxylic acid azide and D(-)-6-(alpha-amino-4-hydroxyphenylacetamido)penicillanic acid.