Abstract: The present invention relates to new cephem compounds, pharmaceutically acceptable salts thereof, pharmaceutical compositions comprising the same and anti-bacterial methods of using the same. The subject cephem compounds comprise a thiadiazine ring bonded to the cephem through an iminoacetamido chain and a pyarzolium ring bonded to the cephem through a methylene chain.

Abstract: The invention relates to compounds of antimicrobial activity, of the formula ##STR1## wherein R.sup.1 is amino or protected amino,R.sup.2 is lower alkyl or lower alkenyl,R.sup.3 is lower alkyl, hydroxy(lower)alkyl or protected hydroxy(lower)alkyl,R.sup.4 is amino, protected amino, lower alkylamino, protected lower alkylamino, carboxy(lower)alkylamino, N-[protected carboxy(lower)alkyl]amino andR.sup.7 is hydrogen or lower alkyl, ora pharmaceutically acceptable salt thereof.

Abstract: The invention relates to cephem compounds characterized by a substituted 2-pyrazolimethyl group and a 7-(aminothiazolyl) (hydroxyimino)-acetamido group and certain derivatives thereof, to pharmaceutical compositions comprising the same and to use for treatment of infectious diseases.

Abstract: The invention relates to antimicrobial compounds of the formula: ##STR1## wherein R.sup.1 is amino or a protected amino, R.sup.2 is ethyl, propyl or lower alkenyl,R.sup.3 is COO .theta., carboxy or a protected carboxy,R.sup.4 is hydroxy(lower)alkyl or protected hydroxy(lower)alkyl,R.sup.5 is amino or a protected amino,X.sup..theta. is an anion, andn is 0 or 1,or,R.sup.1, R.sup.3, R.sup.5, X.sup..theta. and n are each as defined above,R.sup.2 is lower alkyl, andR.sup.4 is 3-hydroxypropyl, with proviso that(i) when R.sup.3 is COO.sup..theta., then n is 0, and(ii) when R.sup.3 is carboxy or a protected carboxy, then n is 1,or a pharmaceutically acceptable salt thereof.

Abstract: The invention relates to intermediate compounds of the formula: ##STR1## wherein R.sup.3 is a lower alkyl, hydroxy(lower)alkyl or a protected hydroxy(lower)alkyl,R.sup.4 is amino or a protected amino group, andR.sup.5 is hydrogen or lower alkyl, or a salt thereof,useful in the preparation of compounds of antimicrobial activity.

Abstract: The invention relates to a compound, of antimicrobial activity, of the formula: ##STR1## wherein R.sup.1 and R.sup.4 are each amino or a protected amino group,R.sup.2 is carboxy(lower) alkyl or a protected carboxy(lower) alkyl,R.sup.3 is lower alkyl, andR.sup.5 is hydrogen or lower alkyl, or a pharmaceutically acceptable salt thereof.

Abstract: The invention relates to cephem compounds characterized by a substituted 2-pyrazoliomethyl group and a 7-(aminothiazolyl)(alkoxyimino)-acetamido group and certain derivatives thereof, to pharmaceutical compositions comprising the same and to use for treatment of infections diseases.

Abstract: The object of the invention is a new cephem compound with antimicrobial activity used for the treatment of infectious diseases of the general formula: ##STR1## wherein R1 is amino or a protected aminoR2 is lower alkyl which may have 1 to 3 halogensR3 is COO.sup..crclbar., carboxy or a protected carboxyR4 is hydroxy(lower)alkyl or protected hydroxy(lower)alkylR5 is amino or a protected aminoR6 is hydrogen or lower alkylX.sup..crclbar. is an anion, andn is 0 or 1with proviso that(i) when R3 is COO.sup..crclbar., then n is 0, and(ii) when R3 is carboxy or a protected carboxy, then n is 1,and pharmaceutically acceptable salt thereof.

Abstract: 7 .beta.-[2-5 amino-1, 2, 4 thiadiazol-3yl) 2(carboxy lower alkyleneoxyimino) acetamido]-3-(3-amino-2-alkyl-1-pyrazolio) methyl 3 cephem 4 carboxylates are prepared. They are antibiotics.

Abstract: The invention relates to antimicrobial compounds of the formula: ##STR1## wherein R.sup.1 is amino or a protected amino group,R.sup.2 is carboxy or a protected carboxy group andR.sup.3 is thiadiazolylthiomethyl or thiadiazolylthiomethyl substituted with lower alkyl, and pharmaceutically acceptable salts thereof.

Abstract: The invention relates to novel halovinyl cephem derivatives of high antimicrobial activity of the formula: ##STR1## wherein R.sup.1 is a group of the formula:R.sup.4 --A--CONH--in which R.sup.4 is cyano(lower)alkenylthio or a group of the formula: ##STR2## in which R.sup.6 is hydrogen, amino or a protected amino group, andA is carbonyl, lower alkylene, hydroxy(lower)alkylene or a group of the formula: ##STR3## in which R.sup.5 is hydrogen, carboxy(lower)alkyl or protected carboxy(lower)alkyl;R.sup.2 is carboxy or a protected carboxy group; andX is halogen, and pharmaceutically acceptable salts thereof.

Abstract: The invention relates to novel compounds of high antimicrobial activity of the formula: ##STR1## wherein R.sup.1 is amino or protected amino,R.sup.2 is carboxy(lower)alkyl or protected carboxy(lower)alkyl, andR.sup.3 is carboxy or protected carboxy,and a pharmaceutically acceptable salt thereof.