Compounds of the formula ##STR1## wherein R.sup.12 is a leaving group, Z is S, O or CH.sub.2 and A is a phenyl, furyl, thienyl or pyridyl ring substituted by a ##STR2## moiety, in which R.sup.8 and R.sup.9 are various substituents or, when taken together with the nitrogen, may be a specified heterocyclic ring, are intermediates in the preparation of histamine H.sub.2 -antagonist anti-ulcer agents of the formula ##STR3## in which R.sup.1 and R.sup.2 are any of several specified substituents.
Pyridine derivatives of 1,2-diaminocyclobutene-3,4-diones
申请人:Bristol-Myers Company
公开号:US04539316A1
公开(公告)日:1985-09-03
Compounds of the formula ##STR1## wherein R.sup.12 is a leaving group, Z is S, O or CH.sub.2 and A is a phenyl, furyl, thienyl or pyridyl ring substituted by a ##STR2## moiety, in which R.sup.8 and R.sup.9 are various substituents or, when taken together with the nitrogen, may be a specified heterocyclic ring, are intermediates in the preparation of histamine H.sub.2 -antagonist anti-ulcer agents of the formula ##STR3## in which R.sup.1 and R.sup.2 are any of several specified substituents.
Certain 1-(substituted amino)-2-(amino or substituted amino)cyclobutene-3,4-diones are potent histamine H.sub.2 -antagonists useful in the treatment of peptic ulcers.
Certain 1-(substituted amino)-2-(amino or substituted amino)cyclobutene-3,4-diones are potent histamine H.sub.2 -antagonists useful in the treatment of peptic ulcers.
Compositions comprising pepstatin and an histamine H2-receptor antagonist having an enhanced antiulcer activity
申请人:Bristol-Myers Company
公开号:EP0099122A2
公开(公告)日:1984-01-25
Enhanced antiulcer activity is obtained in warm-blooded animals by the concomitant administration of the pepsin complexing agent, pepstatin, and an histamine H2-receptor antagonist of the formula
wherein A, m, Z, n, R1 and R2 are as defined herein. Concomitant administration of the two entities reduces the amount of histamine H2-receptor antagonist necessary for treatment, thereby decreasing its side-effect liability.