Abstract: Tricyclic imidazolones enhance myocardial contractile force and are useful as cardiotonics in the treatment of heart failure.

Abstract: Aroylthiazolones enhance myocardial contractile force and are useful as cardiotonics in the treatment of heart failure.

Abstract: This invention relates to alkoxyimino ether derivatives of 5-acyl-2(1H)-pyridinones and to their use as cardiotonic agents useful in treating cardiac failure, and to the process useful in the preparation thereof.

Abstract: Novel 5-acyl-2-(1H)pyridinones and their use as cardiotonic agents. Typical of the compounds is 5-acetyl-1,2-dihydro-6-methyl-2-oxo-3-pyridinecarbonitrile which is prepared by condensing anionic cyano acetamide with 3-[(dimethylamino)methylenyl]-2,4-pentanedione in an inert organic solvent.

Abstract: Phenyloxazolones are useful as cardiotonics in the treatment of heart failure and enhance cardiac function.

Abstract: Heterocyclic oxazolones enhance myocardial contractile force and cardiac function and are used as cardiotonics in the treatment of heart failure.

Abstract: Heterocyclocarbonyl- and acetyl-thiazolones enhance myocardial contractile force and are useful as cardiotonics in the treatment of heart failure.

Abstract: Novel 5-acyl-2-(1H)pyridinones and their use as cardiotonic agents. Typical of the compounds is 5-acetyl-1,2-dihydro-6-methyl-2-oxo-3-pyridinecarbonitrile which is prepared by condensing anionic cyano acetamide with 3-[(dimethylamino)methylenyl]-2,4-pentanedione in an inert organic solvent.

Abstract: Pyrrole-3-carboxylates of the following general structure ##STR1## wherein R.sub.1 is a hydrogen or lower alkyl group; R.sub.2 is a 1 to 8 carbon atom alkyl group; and R.sub.3 is a hydrogen, lower alkyl, pyridyl, pyridylmethyl, pyrryl, pyrrylmethyl, thienyl, thienylmethyl or phenyl or benzyl optionally substituted with one or two lower alkyl, lower alkoxy, lower alkylthio, halogen, nitro, hydroxy, carboxy or cyano groups or with a methylenedioxy group.

Abstract: This invention relates to certain substituted aroylimidazolones, their acid and base addition salts thereof, and to their use as cardiotonic agents.

Abstract: 1,3-Dihydro-2H-imidazol-2-ones having 5-acyl and 4-oxymethyl substituents, are useful as cardiotonics, antihypertensives and antithrombotic agents. The compounds are obtained by the reaction of an appropriate alcohol or a silver salt with a substituted 4-bromomethyl-1,3-dihydro-2H-imidazol-2-one.

Abstract: 4-alkanoylimidazol-2-ones of the following general structure which are useful as cardiotonics in the treatment of cardiac failure ##STR1## wherein Q and T are each an oxygen atom or a divalent sulfur atom; R is hydrogen, lower alkyl, lower alkylcarbonyl or benzoyl; R.sub.1 is hydrogen or lower alkyl; R.sub.2 is a lower aliphatic hydrocarbon radical, phenyl alkylene or heterocyclo alkylene; and the pharmaceutically acceptable salts thereof.

Abstract: The use of novel imidazolecarboxylic acid derivatives of the following general structure which are useful as antihypertensives, cardiotonics and antithrombotics ##STR1## wherein Q and T are an oxygen or sulfur atom; R is hydrogen, lower alkyl, lower alkylcarbonyl or benzoyl; R.sub.1 is hydrogen or --CH(R.sub.3)R.sub.4 ; R2 is lower alkoxy, phenoxy or phenoxy substituted at the ortho, meta, or para position with lower alkyl, lower alkoxy, hydroxy, halogen, trifluoromethyl, lower alkylthio, lower alkylsulfone, or lower alkylsulfoxide; R.sub.3 is hydrogen or lower alkyl; R.sub.4 is hydrogen, hydroxy, lower alkoxy, lower alkylcarbonyl, --ONO.sub.2 or halogen; and their pharmaceutically acceptable salts thereof.

Abstract: This invention relates to aroyl-2-imidazolidinones of the following general structure which are useful as cardiotonics and antihypertensive agents ##STR1## wherein Ar is furanyl, thienyl, 1H-pyrrolyl, or phenyl optionally substituted with one or two X groups; X is halogen, hydroxy, lower alkyl, lower alkoxy, lower alkylthio, lower alkylsulfoxide, lower alkylsulphone, trifluoromethyl, --SO.sub.2 N(R.sub.2).sub.2, NR.sub.3 R.sub.4, pyrrolidino, piperidino, morpholino, piperazino or N'-alkyl-piperazino; R is hydrogen, lower alkyl, lower alkylcarbonyl or benzoyl; each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is hydrogen or lower alkyl; T is an oxygen atom or a divalent sulfur atom; and the pharmaceutically acceptable salts thereof.

Abstract: This invention relates to aroylimidazole-2-ones and their acid and base addition salts as well as their use as cardiotonics in the treatment of cardiac failure.

Abstract: Novel 4-aroylimidazol-2-ones of the following general structure which are useful as antihypertensives, cardiotonics, antithrombotics, bronchodilators and uterospasmolytics ##STR1## wherein Ar is 2-furyl, 2-thienyl or phenyl, the latter of which may optionally be substituted with one or two X groups; X is halogen, hydroxy, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, methylenedioxy, C.sub.1-4 alkylthio, C.sub.1-4 alkylsulfoxide, C.sub.1-4 alkylsulfone, CF.sub.3, --SO.sub.2 N(R.sub.2).sub.2, NR.sub.3 R.sub.4, pyrrolidino, piperidino, morpholino, piperazino or N'-alkyl-piperazino, R is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkylcarbonyl or benzyl; each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen or C.sub.1-4 alkyl; and the pharmaceutically acceptable salts thereof.

Abstract: 1,3-Dihydro-2H-imidazol-2-ones having 5-acyl and 4-(substituted amino)methyl substituents, are useful as cardiotonics, antihypertensives and antithrombotic agents. The compounds are obtained by the reaction of an appropriate amine with a substituted 4-bromomethyl-1,3-dihydro-2H-imidazol-2-one.

Abstract: 2,3-Dihydro-2-oxo-1H-imidazole-4-carboxylic acid derivatives having a (substituted amino)methyl substituent at the 5-position, are useful as cardiotonics, antihypertensives and antithrombotic agents. The compounds are obtained by the reaction of an appropriate amine with a 5-(bromomethyl)-2,3-dihydro-2-oxo-1H-imidazole-4-carboxylic acid ester or amide.

Abstract: 4-Alkanoylimidazol-2-ones of the following general structure which are useful as cardiotonics in the treatment of cardiac failure ##STR1## wherein Q and T are each an oxygen atom or a divalent sulfur atom; R is hydrogen, lower alkyl, lower alkylcarbonyl or benzoyl; R.sub.1 is hydrogen or lower alkyl; R.sub.2 is a lower aliphatic hydrocarbon radical, phenyl alkylene or heterocyclo alkylene; and the pharmaceutically acceptable salts thereof.

Abstract: 1,3-Dihydro-2H-imidazol-2-ones having 5-acyl and 4-(4-phenyl-1-piperidinyl)methyl substituents, are useful as cardiotonics, antihypertensives and antithrombotic agents. The compounds are obtained by the reaction of an appropriate substituted piperidine with a substituted 4-bromomethyl-1,3-dihydro-2H-imidazol-2-one.