Derivatives of the acid penicillanic, their preparation and their application of international application no.

摘要

P the invention relates to derivatives of the acid penicillanic having excellent anti - bacterial action, in particular against the bacteria belonging to the family of pseudomonas aeruginosa and correspond to the formula: in which r1 is a hydrogen atom or a lower alkyl group; r2 is a hydrogen atom or a hydroxyl group and r3 is a hydroxyl group or an alkenoyloxy below; n is equal to 2 or 3; at least two of the r3 is connected to the adjacent carbon atoms, the position of the substituent r3 being chosen from among the positions 3 to 5 when r1 is a lower alkyl group and r3 is a hydroxyl group, and among the positions 2 to 6 when r1 and r 3 are other substituents, and the salts of these compounds. / p