Acylamino-cephem-carboxylic acids containing an amidino or guanidino group in the molecule

Claim 1

An acylamino-cephem-carboxylic acid of the formula ##STR464## and physiologically tolerated salts and physiologically tolerated esters thereof, wherein R 1 , R 2 , and R 3 , taken alone, are hydrogen or alkyl having 1 to 8 carbon atoms; R 1 and R 2 , taken together, or R 2 and R 3 , taken together, are alkylene having 2 to 5 carbon atoms, alkylene having 2 to 5 carbon atoms substituted with alkyl having 1 to 4 carbon atoms or with alkyl having 1 to 4 carbon atoms interrupted by an oxygen atom, or are alkylene having 2 to 5 carbon atoms which is ortho- or spiro-fused to 5- or 6-membered cycloalkyl or oxacycloalkyl; X is a single bond or --NH--; A is phenylene, thienylene, or phenylene or thienylene substituted with alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, or halogen; Y is a single bond or --O--; and Z is is a heterocyclic ring selected from the group consisting of thienyl, furyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiazolinyl, oxazolyl, oxazolinyl, isoxazolyl, triazolyl, thiadiazolyl, oxadiazolyl, tetrazolyl thiatriazolyl, pyridyl, pyrimidyl, pyrazinyl, pyradiazinyl, thiazinyl, triazinyl, thiadiazinyl, imidazolinyl and tetrahydropyrimidyl, or Z is such a heterocyclic ring substituted by at least one member selected from the group consisting of alkyl having 1 to 15 carbon atoms, cyclopentyl, cyclohexyl, lower alkoxy, lower alkenyl, lower alkylmercapto, lower alkoxycarbonyl, lower alkoxycarbonylamino, amino, lower alkylamino, hydroxy, nitro, phenyl, lower alkoxyphenyl, halophenyl, hydroxyphenyl, aminophenyl, lower alkylphenyl, cetylphenyl, nitrophenyl, biphenylyl, pyridyl, methylpyridyl, furyl, naphthyl, quinolyl, isoquinolyl, thienyl, 2-thiazolyl, 2-pyrrolyl, 4-imidazolyl, 5-pyrazolyl, 4-isoxazolyl, and lower alkyl having 1 to 4 carbon atoms substituted by phenyl, phenoxy, lower alkoxy, or lower alkoxycarbonyl, or Z is such a heterocyclic ring ortho-fused to a benzene ring, or Z is pyridyl-N-oxide or pyridazinyl-N-oxide.