The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1991
Filed:
Mar. 22, 1990
Peter Morsdorf, Langenzenn, DE;
Helmut Schickaneder, Eckental, DE;
Rolf Herter, Schwabach, DE;
Volker Pfanhlert, Nuremberg, DE;
Geidrun Engler, Cadolzburg, DE;
Kurt H Ahrens, Nuremberg, DE;
Heumann Pharma GmbH & co., Nuremberg, DE;
Abstract
New benzimidazoles correponding to the general formula I ##STR1## are described, in which the pyridazinone ring is attached in the 5- or 6- position of the benzimidazole ring and R.sup.1 denotes a hydrogen atom or a straight chained or branched C.sub.1 to C.sub.4 alkyl group, R.sup.2 denotes a hydrogen atom, a straight chained or branched C.sub.1 to C.sub.4 alkyl group, a C.sub.1 to C.sub.4 alkoxy group, a hydroxy group, a halogen atom, an amino group or a nitro group, A denotes a hydrogen atom, a group of the formula ##STR2## wherein R.sup.3 denotes a hydrogen atom, an optionally substituted C.sub.1 to C.sub.4 alkyl group or a C.sub.1 to C.sub.4 alkoxy group and B denotes a cyano group, a benzoyl group or a phenylsulphonyl group, or A denotes a group of the formula ##STR3## in which m has the value 2 or 3 and n represents an integer from 1 to 6, and the physiologically acceptable salts thereof as well as processes for their preparation and pharmaceutical preparations. containing these compounds These compounds are new, effective, positive inotropic substances which do not act by the mechanism of phosphodiesterase inhibition.