4,5-dihydro-3(2H)-pyridazinones and their pharmacological use
申请人:Cassella Aktiengesellschaft
公开号:US04816454A1
公开(公告)日:1989-03-28
Substituted 4,5-dihydro-3(2H)-pyridazinones of the formula I ##STR1## wherein R, for example, denotes a radical of the formula ##STR2## R.sup.1 and R.sup.2, for example, denote hydrogen or methyl, R.sup.3, for example, denotes 2-methoxy-ethoxy, 3-pyridyl-methoxy, amino-carbonyl-methoxy, hydroxy-carbonyl-methoxy, methyl-thio, (2-methoxy-ethyl)-amino-carbonyl-methoxy, 3-pyridyl-methyl or 5-methyl-1,3,4-oxadiazol-2-yl and R.sup.4, for example, denotes hydrogen, have useful pharmacological properties and can therefore be used for the preparation of pharmacological products.
Compounds of the Formulae: ##STR1## are antagonists of leukotrienes of C.sub.4, D.sub.4 and E.sub.4, the slow reacting substance of anaphylaxis. These compounds are useful as anti-asthmatic, anti-allergic, anti-inflammatory, and cytoprotective agents.
Use of leukotriene antagonists for producing cytoprotective pharmaceutical compositions and process for producing cytoprotective pharmaceutical compositions
申请人:Merck & Co., Inc.
公开号:EP0156233A2
公开(公告)日:1985-10-02
Leukotriene antagonists have been found to be useful for inducing cytoprotection via an unspecified mechanism. Specific therapeutic utilities include, erosive gastritis, erosive esophagitis, inflammatory bowel disease, and induced hemorrhagic gastric erosions such as those caused by indomethacin or ethanol.
The leukotriene antagonists are used to produce cytoprotective pharmaceutical compositions. In a process for producing cytoprotective pharmaceutical compositions the leukotriene antagonists are incorporated into a corresponding composition in a cytoprotective effective amount.