Ciba-Geigy Corporation

Fujisawa Pharmaceutical Company, Ltd.

Karl Heusler

Hans Bickel

Riccardo Scartazzini

Robert B Woodward

Heinrich H Peter

Bruno Fechtig

The invention concerns 7-amino-ceph-3-em-4-carboxylic acid compounds of the formula ##STR1## wherein R.sub.1.sup.a represents hydrogen or an amino protective group R.sub.1.sup.A and R.sub.1.sup.b represent hydrogen or an acyl group AC, or R.sub.1.sup.A and R.sub.1.sup.b together denote a bivalent amino protective group, and R.sub.2 represents hydrogen or an organic radical R.sub.2.sup.A which together with the --C(.dbd.O)--O-- grouping forms a protected carboxyl group, or salts such compounds which possess salt-forming groups; these compounds have antibiotic properties.

8-oxo-5-thia-1-azabicyclo(4,2,0)oct-2-ene compounds

The invention concerns 7-amino-ceph-3-em-4-carboxylic acid compounds of the formula ##STR1## wherein R.sub.1.sup.a represents hydrogen or an amino protective group R.sub.1.sup.A and R.sub.1.sup.b represent hydrogen or an acyl group Ac, or R.sub.1.sup.A and R.sub.1.sup.b together denote a bivalent amino protective group, and R.sub.2 represents hydrogen or an organic radical R.sub.2.sup.A which together with the --C(.dbd.O)--O-- grouping forms a protected carboxyl group, or salts such compounds which possess salt-forming groups; these compounds have antibiotic properties.

8-Oxo-5-thia-1-azabicyclo(4,2,0)oct-2-ene compounds

The invention concerns 3-amino-4-(2-hydroxyethylthio)-2-oxo-azetidine compounds of the formula ##STR1## wherein R.sub.1.sup.a represents hydrogen or an amino protective group R.sub.1.sup.A, R.sub.1.sup.b represents hydrogen or an acyl group Ac.sub.1, or R.sub.1.sup.a and R.sub.1.sup.b together denote a bivalent amino protective group, R.sub.2 represents hydrogen or an acyl radical Ac.sub.2, and each of the radicals R.sub.3 and R.sub.4 represents hydrogen or an organic radical bonded via a carbon atom, or salts of such compounds having salt-forming groups.

Mercaptoalcohols and process for their manufacture

.alpha.-Hydroxy-2-oxo-1-azetidinemethane-carboxylic acid compounds of formula ##STR1## wherein R.sub.1 represents a hydrogen atom or the organic residue of an alcohol, R.sub.2 represents a hydrogen atom or an acyl residue, R.sub.3 represents an organic residue and R.sub.4 represents a hydrogen atom, when R.sub.2 stands for an acyl residue, or the two groups R.sub.3 and R.sub.4 together represent a disubstituted carbon atom, when R.sub.2 stands for a hydrogen atom or an acyl group, are useful as intermediates for the manufacture of pharmacologically active compounds.

Growing community of inventors

Basel, Switzerland

Karl Heusler