4-heteropentacyclic-4-[N-(phenyl)amino] piperidine derivatives and pharmaceutical compositions and method employing such compounds

A compound of the formula ##STR139## optically active isomeric forms thereof, or pharmaceutically acceptable acid addition salts thereof, in which formula:

• R.sup.1 is 1,2,4-triazol-4-yl, 1-methylimidazol-2-yl, 1-methyl-1,2,4-triazol-5-yl, 1-methyl-1H-tetrazol-5-yl, 2-methyl-2H-tetrazol-5-yl, methyl or ethyl-1,3,4-oxadiazolyl, methoxymethyl-1,3,4-oxadiazolyl, and 4-methyl-thiazol-2-yl, 4,5-dimethyl-thiazol-2-yl, or thiazol-2-yl;
• R.sup.2 is substituted or unsubstituted phenyl in which the substituent is a halogen atom;
• R.sup.3 is a lower alkyl or a lower alkoxy lower alkyl;
• and L is lower alkyl, lower alkoxy, thienyl lower alkyl, thiazolyl lower alkyl which is unsubstituted or substituted in the 4-position with a lower alkyl;
• (4,5-di-hydro-5-oxo-1H-tetrazol-1-yl) lower alkyl which is unsubstituted or substituted in the 4-position with a lower alkyl;
• pyrazolyl lower alkyl, pyridinyl lower alkyl, oxo phenyl lower alkyl, N-pthalimido lower alkyl, 2,4-(1H,3H)-pyridinedionyl, disubstituted in the 3 position with lower alkyl;
• or unsubstituted and substituted phenyl lower alkyl in which the substituents are selected from the group consisting of lower alkyl, lower alkoxy, halogen, halogenated lower alkyl, or combinations thereof.

A narcotic agonist or analgesic composition comprising a non-toxic pharmaceutically acceptable carrier and therapeutically effective amount of a compound of the formula ##STR140## optically active isomeric forms thereof, or pharmaceutically acceptable acid addition salts thereof, in which formula:

• R.sup.1 is an unsubstituted or substituted oxadiazolyl, tetrazolyl, imidazolyl, or thiazolyl, wherein the substituents are selected from lower alkyl, lower alkoxy, lower alkoxy lower alkyl, or combinations thereof;
• R.sup.2 is unsubsttuted or substituted phenyl in which the substituent is a halogen atom;
• R.sup.3 is a lower alkyl or a lower alkoxy lower alkyl;
• and L is lower alkyl, lower alkoxy, phenyl lower alkyl, thienyl lower alkyl, thiazolyl lower alkyl which is unsubstituted or substituted in the 4-position with a methyl group;
• (4,5-dihydro-5-oxo-1H-tetrazol-1-yl) lower alkyl which is unsubstituted or substituted in the 4-position with lower alkyl;
• pyrazolyl lower alkyl, pyridinyl lower alkyl, oxo phenyl lower alkyl, N-pthalimido lower alkyl, 2,4-(1H,3H)-pyridinyl, disubstituted in the 3 position with lower alkyl;
• or an unsubstituted or substituted phenyl lower alkyl in which the substituents are selected from the group consisting of lower alkyl, lower alkoxy, halogen, halogenated lower alkyl, or combinations thereof.

A method for providing analgesia in a mammal, comprising administering to such mammal an analgesically effective amount of a compound of the formula ##STR142## optically isomeric forms thereof, or pharmaceutically acceptable acid addition salts thereof, in which formula:

• R.sup.1 is an unsubstituted or substituted oxadiazolyl, tetrazolyl, imidazolyl, or thiazolyl wherein the substituents are selected from the group consisting of lower alkyl, lower alkoxy, lower alkoxy lower alkyl or combinations thereof;
• R.sup.2 is unsubstituted or substituted phenyl in which the substituent is a halogen atom;
• R.sup.3 is a lower alkyl or a lower alkoxy lower alkyl;
• and L is lower alkyl, lower alkoxy, phenyl lower alkyl, thienyl lower alkyl, thiazolyl lower alkyl which is unsubstituted or substituted in the 4-position with a lower alkyl;
• (4,5-dihydro-5-oxo-1H-tetrazol-1-yl) lower alkyl which is unsubstituted or substituted in the 4-position with a lower alkyl;
• pyrazolyl lower alkyl, pyridinyl lower alkyl, oxo phenyl lower alkyl, N-pthalimido lower alkyl, 2,4-(1H,3H)pyridinedionyl, which is disubstituted in the 3 position with lower alkyl, or unsubstituted or substituted phenyl lower alkyl in which the substituents are selected from the group consisting of lower alkyl, lower alkoxy, halogen, halogenated lower alkyl, or combinations thereof.