6-Aryl-4-hydrazinyl-s-triazin-2-ones

A compound of the formula ##STR15## wherein:

• X is oxygen or sulfur;
• R.sub.1 is hydrogen or lower alkyl;
• R.sub.4 is hydrogen, lower alkyl, cycloalkyl of C3 to C6, lower alkenyl, lower alkynyl, lower alkanoyl, carboloweralkoxy, carbamoyl, phenyl, substituted phenyl, benzoyl, substituted benzoyl, phenyl loweralkyl, substituted phenyl loweralkyl, heterocyclic, substituted heterocyclic, halo lower alkyl, or halo lower alkanoyl;
• R.sub.6 is phenyl, substituted phenyl, heterocyclic, substituted heterocyclic, heterocyclic lower alkyl or substituted heterocyclic lower alkyl;
• wherein:
• substituted phenyl means a phenyl group in which one or more of the phenyl hydrogens has been replaced by the same or different substituents including selected from the group consisting of halo, lower alkyl, halo lower alkyl, nitro, amino, acylamino, hydroxy, lower alkoxy, phenyl lower alkoxy, acyloxy, cyano, halo lower alkoxy or lower alkyl sulfonyl;
• wherein:
• heterocyclic means a cyclic or bicyclic group having 1 to 3 hetero atoms which may be nitrogen, oxygen or sulfur, selected from the group consisting of oxazolidinyl, thiazolidinyl, pyrazolidinyl, imidazolidinyl, piperidyl, piperazinyl, thiamorpholinyl, 1-pyrrole, 2-pyrrole, 3-pyrrole, 2-furan, 3-furan, 2-thiophene, 3-thiophene, 2-tetrahydrothiophene, 3-tetrahydrothiophene, 1-imidazole, 2-imidazole, 4-imidazole, 5-imidazole, 2-oxazole, 4-oxazole, 5-oxazole, 2-thiazole, 4-thiazole, 5-thiazole, 1-pyrazole, 3-pyrazole, 4-pyrazole, 5-pyrazole, 1-pyrrolidine, 2-pyrrolidine, 3-pyrrolidine, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrimidine, 4-pyrimidine, 5-pyrimidine, 6-pyrimidine, 2-purine, 6-purine, 8-purine, 9-purine, 2-quinoline, 3-quinoline, 4-quinoline, 5-quinoline, 6-quinoline, 7-quinoline, 8-quinoline, 1-isoquinoline, 3-isoquinoline, 4-isoquinoline, 5-isoquinoline, 6-isoquinoline, 7-isoquinoline, 8-isoquinoline, carbazole, trimethylenetriaminyl, ethyleneiminyl and morpholinyl;
• and wherein:
• substituted heterocyclic means a heterocyclic group in which one or more of the hydrogens on the ring carbons have been replaced by substituents as given above with respect to substituted phenyl;
• or a pharmaceutically acceptable acid addition salt thereof.

A compound of the formula ##STR16## wherein:

• X is oxygen or sulfur;
• R.sub.1 is hydrogen or lower alkyl;
• R.sub.4 is hydrogen, lower alkyl, lower alkanoyl, or halo lower alkanoyl;
• R.sub.6 is phenyl or substituted phenyl;
• wherein:
• substituted phenyl means phenyl in which one or more of the phenyl hydrogens has been replaced by the same or different substituents selected from the group consisting of halo, lower alkoxy, lower alkyl, halo lower alkyl, nitro, amino, lower alkanoyl, hydroxy, carbo lower alkoxy, phenyl lower alkoxy, lower alkylacyloxy, cyano, halo lower alkoxy and lower alkyl sulfonyl;
• or a pharmaceutically acceptable acid addition salt thereof.

A compound of the formula ##STR17## wherein:

• X is oxygen or sulfur;
• R.sub.1 is hydrogen or lower alkyl;
• R.sub.4 is hydrogen, lower alkyl, lower alkanoyl, carboloweralkoxy, phenyl, benzoyl, substituted phenyl, pyridyl, or substituted pyridyl;
• R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e are hydrogen, lower alkyl, lower alkoxy, halo, halo lower alkyl, amino, nitro, lower alkanoyl, lower alkyl, carbamoyl, hydroxy, cyano, carboloweralkoxy, carboxyl, or lower alkyl sulfonyl;
• wherein:
• substituted phenyl means a phenyl group in which one or more of the phenyl hydrogens has been replaced by the same or different substituents selected from the group consisting of halo, lower alkyl, halo lower alkyl, nitro, amino, acylamino, hydroxy, lower alkoxy, phenyl lower alkoxy, acyloxy, cyano, halo lower alkoxy or lower alkyl sulfonyl;
• and wherein:
• substituted pyridyl means a pyridyl group in which one or more of the hydrogens on pyridyl ring carbons have been replaced by substituents as given above with respect to substituted phenyl;
• or a pharmaceutically acceptable acid addition salt thereof.

A compound according to the formula ##STR18## wherein:

• X is oxygen or sulfur;
• R.sub.4 is hydrogen, methyl or acetyl;
• R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e are hydrogen, halo or alkyl;
• or a pharmaceutically acceptable acid addition salt thereof.

A compound according to the formula ##STR19## wherein:

• X is oxygen or sulfur;
• R.sub.4 is hydrogen, lower alkyl, or lower alkanoyl;
• R.sub.b and R.sub.d are hydrogen or halo;
• provided that at least one of R.sub.b and R.sub.d is halo;
• or a pharmaceutically acceptable acid addition salt thereof.

A method for lowering blood pressure in humans and other mammals which comprises administering thereto an effective blood pressure lowering amount of a compound of the formula ##STR20## wherein:

• X is oxygen or sulfur;
• R.sub.1 is hydrogen, lower alkyl, cycloalkyl of C3 to C6, lower alkenyl, lower alkynyl, phenyl loweralkyl or substituted phenyl loweralkyl;
• R.sub.4 is hydrogen, lower alkyl, cycloalkyl of C3 to C6, lower alkenyl, lower alkynyl, lower alkanoyl, carboloweralkoxy, carbamoyl, phenyl, substituted phenyl, benzoyl, substituted benzoyl, phenyl loweralkyl, substituted phenyl loweralkyl, heterocyclic, substituted heterocyclic, halo lower alkyl, or halo lower alkanoyl;
• R.sub.6 is phenyl, substituted phenyl, phenyl loweralkyl, substituted phenyl loweralkyl, heterocyclic, substituted heterocyclic, heterocyclic lower alkyl, or substituted heterocyclic lower alkyl;
• wherein:
• substituted phenyl means a phenyl group in which one or more of the phenyl hydrogens has been replaced by the same or different substituents selected from the group consisting of halo, lower alkyl, halo lower alkyl, nitro, amino, acylamino, hydroxy, lower alkoxy, phenyl lower alkoxy, acyloxy, cyano, halo lower alkoxy or lower alkyl sulfonyl;
• wherein:
• heterocyclic means a cyclic or bicyclic group having 1 to 3 hetero atoms which may be nitrogen, oxygen or sulfur, selected from the group consisting of oxazolidinyl, thiazolidinyl, pyrazolidinyl, imidazolidinyl, piperidyl, piperazinyl, thiamorpholinyl, 1-pyrrole, 2-pyrrole, 3-pyrrole, 2-furan, 3-furan, 2-thiophene, 3-thiophene, 2-tetrahydrothiophene, 3-tetrahydrothiophene, 1-imidazole, 2-imidazole, 4-imidazole, 5-imidazole, 2-oxazole, 4-oxazole, 5-oxazole, 2-thiazole, 4-thiazole, 5-thiazole, 1-pyrazole, 3-pyrazole, 4-pyrazole, 5-pyrazole, 1-pyrrolidine, 2-pyrrolidine, 3-pyrrolidine, 2-pyridyl, 3-pyridyl, 4-pyridyl, 2-pyrimidine, 4-pyrimidine, 5-pyrimidine, 6-pyrimidine, 2-purine, 6-purine, 8-purine, 9-purine, 2-quinoline, 3-quinoline, 4-quinoline, 5-quinoline, 6-quinoline, 7-quinoline, 8-quinoline, 1-isoquinoline, 3-isoquinoline, 4-isoquinoline, 5-isoquinoline, 6-isoquinoline, 7-isoquinoline, 8-isoquinoline, carbazole, trimethylenetriaminyl, ethyleneiminyl and morpholinyl;
• and wherein:
• substituted heterocyclic means a heterocyclic group in which one or more of the hydrogens on the ring carbons have been replaced by substituents as given above with respect to substituted phenyl;
• or a pharmaceutically acceptable acid addition salt thereof.

A method for lowering blood pressure in humans and other mammals which comprises administering thereto an effective blood pressure lowering amount of a compound of the formula ##STR21## wherein:

• X is oxygen or sulfur;
• R.sub.1 is hydrogen or lower alkyl;
• R.sub.4 is hydrogen, lower alkyl, lower alkanoyl, carboloweralkoxy, phenyl, benzoyl, substituted phenyl, pyridyl, or substituted pyridyl;
• R.sub.a, R.sub.b, R.sub.c, R.sub.d and R.sub.e are hydrogen, lower alkyl, lower alkoxy, halo, halo lower alkyl, amino, nitro, lower alkanoyl, lower alkyl, carbamoyl, hydroxy, cyano, carboloweralkoxy, carboxyl, or lower alkyl sulfonyl;
• wherein:
• substituted phenyl means a phenyl group in which one or more of the phenyl hydrogens has been replaced by the same or different substituents selected from the group consisting of halo, lower alkyl, halo lower alkyl, nitro, amino, acylamino, hydroxy, lower alkoxy, phenyl lower alkoxy, acyloxy, cyano, halo lower alkoxy or lower alkyl sulfonyl;
• and wherein:
• substituted pyridyl means a pyridyl group in which one or more of the hydrogens on pyridyl ring carbons have been replaced by substituents as given above with respect to substituted phenyl;
• or a pharmaceutically acceptable acid addition salt thereof.