Tricyclic pyridine derivatives and pharmaceutical compositions

A compound of the formula ##STR28## wherein Q.sup.1 and the nitrogen atom taken together is a group of the formula >N--CH.sub.2 CH.sub.2 -- or >N--CH.dbd.CH--, Ra is a phenyl, pyridyl or thienyl group which is optionally substituted by halogen, trifluoromethyl, nitro, lower alkyl or lower alkoxy, Rb and Rc together with the carbon atom denoted by .alpha. are a group of the formula >C.sub..alpha. --S--CH.dbd.CH-- or >C.sub..alpha. --CH.dbd.CH--S-- which is optionally substituted by halogen, trifluoromethyl, lower alkyl, lower alkoxy, nitro, amino or mono- or di(lower alkyl)amino, and the dotted line signifies an additional bond, Rd is the group of the formula ##STR29## wherein R.sup.3 and R.sup.4 taken together with the nitrogen atom are a 3- to 7-membered, saturated N-heterocycle which is optionally substituted by one or two lower alkyl groups and optionally substituted by one or two hydroxy, lower alkoxy, lower alkanoyloxy, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkoxycarbonyl, lower alkanoyl, carbamoyl, mono- or di(lower alkyl)carbamoyl, oxo or lower alkylenedioxy groups and which can contain as a ring member an oxygen or sulfur atom or the group >N--R.sup.5, and R.sup.5 is hydrogen, lower alkyl, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkanoyl, lower alkoxycarbonyl, carbamoyl or mono- or di(lower alkyl)carbamoyl,

• or a pharmaceutically acceptable acid addition salt of a compound of formula I which has one or more basic substituents.

A pharmaceutical composition comprising a compound of the formula ##STR30## wherein Q.sup.1 and the nitrogen atom taken together is a group of the formula >N--CH.sub.2 CH.sub.2 -- or >N--CH.dbd.CH--, Ra is a phenyl, pyridyl or thienyl group which is optionally substituted by halogen, trifluoromethyl, nitro, lower alkyl or lower alkoxy, Rb and Rc together with the carbon atom denoted by a are a group of the formula >C.sub.a --S--CH.dbd.CH-- or >C.sub.a --CH.dbd.CH--S-- which is optionally substituted by halogen, trifluoromethyl, lower alkyl, lower alkoxy, nitro, amino or mono- or di(lower alkyl)amino, and the dotted line signifies an additional bond, Rd is the group of the formula ##STR31## wherein R.sup.1 is a group of the formula --NR.sup.3 R.sup.4 or a 5-membered, saturated, partially unsaturated or aromatic heterocycle which is attached via a carbon atom and which is optionally substituted by one or two lower alkyl groups and optionally substituted by a (C.sub.3-6)-cycloalkyl, hydroxy, lower alkoxy, loweralkanoyloxy, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkoxycarbonyl, lower alkanoyl, carbamoyl, mono- or di(lower alkyl)carbamoyl, oxo or lower alkylenedioxy group, R.sup.3 and R.sup.4 each, independently, is hydrogen, lower alkyl, lower alkoxyalkyl, lower dialkoxyalkyl, lower alkylenedioxyalkyl, lower cyanoalkyl, lower haloalkyl, lower hydroxyalkyl lower dihydroxyalkyl, lower alkanoyl, lower alkoxycarbonyl or a (C.sub.3-7)-cycloalkyl group which is optionally substituted by hydroxy, lower alkoxy, lower alkanoyloxy, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, oxo, carbamoyl, mono- or di(lower alkyl)carbamoyl or by lower alkylenedioxy or together with the nitrogen atom are a 3- to 7-membered, saturated, N-heterocycle which is optionally substituted by one or two lower alkyl groups and optionally substituted by one or two hydroxy, lower alkoxy, lower alkanoyloxy, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkoxycarbonyl, lower alkanoyl, carbamoyl, mono- or di(lower alkyl)carbamoyl, oxo or lower alkylenedioxy groups and which can contain as a ring member an oxygen or sulfur atom or the group >N--R.sup.5, and R.sup.5 is hydrogen, lower alkyl, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkanoyl, lower alkoxycarbonyl, carbamoyl or mono- or di(lower alkyl)carbamoyl,

• or a pharmaceutically acceptable acid addition salt of a compound of formula I which has one or more basic substituents, and an inert pharmaceutical carrier.

A pharmaceutical composition comprising a compound of the formula ##STR32## wherein Q.sup.1 and the nitrogen atom taken together is a group of the formula >N--CH.sub.2 CH.sub.2 -- or >N--CH.dbd.CH--, Ra is a phenyl, pyridyl or thienyl group which is optionally substituted by halogen, trifluoromethyl, nitro, lower alkyl or lower alkoxy, Rb and Rc together with the carbon atom denoted by .alpha. are a group of the formula >C.sub..alpha. --S--CH.dbd.CH-- or >C.sub..alpha. --CH.dbd.CH--S-- which is optionally substituted by halogen, trifluoromethyl, lower alkyl, lower alkoxy, nitro, amino or mono- or di(lower alkyl)amino, and the dotted line signifies an additional bond, Rd is the group of the formula ##STR33## wherein R.sup.3 and R.sup.4 taken together with the nitrogen atom are a 3- to 7-membered, saturated N-heterocycle which is optionally substituted by one or two lower alkyl groups and optionally substituted by one or two hydroxy, lower alkoxy, lower alkanoyloxy, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkoxycarbonyl, lower alkanoyl, carbamoyl, mono- or di(lower alkyl)carbamoyl, oxo or lower alkylenedioxy groups and which can contain as a ring member an oxygen or sulfur atom or the group >N--R.sup.5, and R.sup.5 is hydrogen, lower alkyl, lower hydroxyalkyl, lower alkoxyalkyl, lower alkanoyloxyalkyl, lower alkanoyl, lower alkoxycarbonyl, carbamoyl or mono- or di(lower alkyl)carbamoyl,

• or a pharmaceutically acceptable acid addition salt of a compound of formula I which has one or more basic substituents, and an inert pharmaceutical carrier.