Ludwig Heumann & Co. Gmbh

Stefan Postius

Helmut Schickaneder

Istvan Szelenyi

Kurt H Ahrens

Rolf Herter

Peter Morsdorf

Herbert Hansen

Walter Schunack

Kurt Wegner

1,3,4-Thiadiazole derivatives corresponding to the general formula I ##STR1## which constitute highly effective inhibitors for histamine-H.sub.2 receptors are described. These compounds in addition have a cytoprotective action.

1,3,4-Thiadiazole derivatives and pharmaceutical preparations useful as

Special pyrazole derivatives corresponding to the general formula I which have a highly selective action on histamine-H.sub.2 receptors are described. Compared with other drugs known to be effective in their action on histamine-H.sub.2 receptors, these compounds have improved pharmacological properties. A method of preparation of these compounds is also described.

Pyrazole derivatives, processes for their preparation and pharmaceutical

Alkanol derivatives corresponding to the general formula I

Alkanol derivatives, and pharmaceutical preparation containing these

Diamine derivatives corresponding to the general formula I

Diamine derivatives and pharmaceutical preparations containing these

The invention relates to new propan-2-ol derivatives corresponding to the following general formula ##STR1## in which R represents ##STR2## and to salts thereof with pharmacologically acceptable acids. These compounds have a selective effect on histamine-H.sub.2 -receptors.

Propan-2-ol derivatives, a process for their production and medicaments

The invention relates to special heterocyclic compounds corresponding to general tautomeric formula I which are distinguished by improved antagonistic activity on histamine-H.sub.2 -receptors. The invention also relates to a process for producing these compounds and to medicaments containing them.

Heterocyclic compounds, a process for their production and medicaments

The invention relates to new pyridine-pyrimidinone derivatives corresponding to the following general formula ##STR1## wherein R.sup.1 represents linear C.sub.1-6 alkyl or cycloalkyl and R.sup.2 represents linear C.sub.1-6 alkyl or R.sup.1 and R.sup.2 together with the nitrogen atom form a pyrrolidine or piperidine ring;

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Nuremberg, Germany

Stefan Postius