Diamond Shamrock Corporation

Zaven S Ariyan

Larry J Powers

Robert E Moser

Russell Buchman

James A Scozzie

William J Pyne

Compounds of the formula ##STR1## are useful antihypertensive agents.

Antihypertensive pyridazin(2H)-3-ones

Certain imidazothiazoles and thiazolopyrimidines have been found to prevent and inhibit the formation of granuloma tissue in animals. This result is accomplished by administering to the animal subject a therapeutically effective amount of a compound having the formula: ##STR1## wherein R is hydrogen or methyl, R' is hydrogen, lower alkyl or thioalkyl, carboxy methyl, or phenyl; R' is lower alkyl, 2-benzofuranyl, naphthyl, phenyl, or mono- or disubstituted phenyl. The hydrated precursors of certain of these compounds as well as the acid addition and quaternary salts of both the compounds and their hydrated precursors may be employed.

Antiinflammatory imidazothiazoles and thiazolopyrimidines

Certain imidazothiazoles and thiazolopyrimidines have been found to prevent and inhibit the formation of granuloma tissue in animals. This result is accomplished by administering to the animal subject a therapeutically effective amount of a compound having the formula: ##STR1## WHEREIN R is hydrogen or methyl, R' is hydrogen, lower alkyl or thioalkyl, carboxy methyl, or phenyl; R' is lower alkyl, 2-benzofuranyl, naphthyl, phenyl, or mono- or disubstituted phenyl. The hydrated precursors of certain of these compounds as well as the acid addition and quaternary salts of both the compounds and their hydrated precursors may be employed.

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Mentor, OH, United States of America

Zaven S Ariyan