EP0223420A1 — Condensed imidazopyridine derivatives

USPTO Abstract

Condensed imidazopyridine derivatives. (wherein R is phenyl optionally substituted by one or two members selected from the group consisting of trifluoromethyl, C 1 -C 5 alkyl, C 1 -C 5 alkoxy, C 1 -C 5 alkylthio, nitro, amino C 1 -C 5 alkanoylamino and C,-C5 alkoxycarbonyl or 5-or 6-membered heterocyclic group optionally substituted by one or two members selected from the group consisting of halogen, C 1 -C 5 alkyl and C 1 -C 5 alkoxy, Q is hydrogen, C 1 -C 5 alkyl, C 1 -C 10 acyl, C,-Cs alkylsulfonyl or Cs-C,o arylsulfonyl, R', R 2 , R 3 , and R 4 each is hydrogen, halogen C 1 -C 5 alkyl, C,-C s alkoxy or C,-C s haloalkyl, Q is present on the nitrogen atom of the 1,3 or 5-position and the dotted line indicates the presence of three double bonds at the position of 2, 3; 3a, 3b; 4, 5 / 1, 3b; 2, 3; 3a, 4 / or 1, 2; 3a, 3b; 4, 5) or its salt, being useful as psychostimulants or anxiolytics, is provided.