Bayer Aktiengesellschaft

Michael Boberg

Karl G Metzger

Hans-Joachim Zeiler

Rolf Angerbauer

Paul Naab

Gunther Kinast

Wilfried Schrock

Dieter Habich

Armin Kern

Samir Samaan

Wolfgang Kanhai

Volker Muschalek

Ulrich Pleiss

Drug containing (-)-metriphonate

Antibacterially active novel cephalosporins of the formula ##STR1## in which R.sup.1 represents alkyl, alkenyl, alkoxy, alkylthio, halogen, trifluoromethyl or trifluoromethoxy,

Cephalosporins

Novel cephalosporins of the formula ##STR1## in which R.sup.1 is an aliphatic or cycloaliphatic hydrocarbyl radical of up to 6 carbon atoms which is optionally substituted by a carboxyl group, ##STR2## R.sup.2 and R.sup.3 each independently is an optionally substituted aliphatic or cycloaliphatic hydrocarbyl radical of up to 6 carbon atoms, but is not unsubstituted methyl, or pharmaceutically acceptable salts thereof, are effective antibacterially and promote the growth of animals.

Antibiotically active penicillins and cephalosporins of the formula ##STR1## in which Z is hydrogen or lower alkoxy,

2-aminothiazolyl-containing .beta.-lactam antibiotics

The new compounds of the formula ##STR1## in which Acyl is alkylcarbonyl optionally substituted by halogen or aryl, or arylcarbonyl, which is substituted by lower alkoxy, halogen or nitro,

Novel intermediates for the synthesis of cephalosporins

Antibacterially effective cephalosporins of the formula ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.6 -alkyl, phenyl or halogen-substituted phenyl and

7-[2-(2-

Novel .beta.-lactam antibiotics of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3, which may be identical or different, denote a substituted or unsubstituted alkyl radical or a monocyclic or bicyclic, optionally substituted, carbocyclic or heterocyclic ring, or

Novel .beta.-lactam antibiotics

Novel antibacterially active cephalosporins of the formula ##STR1## in which R.sup.1 denotes hydrogen, optionally substituted alkyl, a substituted or unsubstituted phenyl ring, a polycyclic aromatic ring or an optionally substituted heterocyclic 5- or 6-member ring having 1-4 heteroatoms,

Antibacterially active cephalosporins of the formula ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.6 -alkyl, phenyl or halogen-substituted phenyl, and

A .beta.-lactam of the formula ##STR1## or a hydrate thereof, in which

.beta.-Lactam antibiotics

.beta.-Lactam antibiotics of the formula ##STR1## in which A is a hydrogen atom, an optionally substituted alkyl, alkenyl, alkinyl or cycloalkyl group, a substituted or unsubstituted phenyl ring, a polycyclic aromatic ring or an optionally substituted heterocyclic 5-membered or 6-membered ring with 1 to 4 hetero-atoms,

Growing community of inventors

Wuppertal, Germany

Michael Boberg