| abstract |
Thiazole derivatives of formula (I) wherein R1 is amino; lower alkylamino; heterocyclic ring containing nitrogen which may be substituted with halogen(s), amino(s), N-oxide, lower alkoxy(s), lower alkyl(s), lower alkoxycarbonyl(s), halo(lower)-alkoxycarbonyl(s), cyano(s), cyclo(lower)alkylamino(s), lower alkylamino(s), heterocyclic ring containing nitrogen (s), or oxo; or lower alkyl substituted with heterocyclic ring containing nitrogen; R2 is hydrogen; hydroxy; lower alkyl; or lower alkoxy; R3 is hydrogen; lower alkyl which may be substituted with acyl(s), N-mono(or di)(lower)alkylamino(s), lower alkylthio(s), lower alkoxy(s), carboxy(s), heterocyclic ring containing nitrogen(s), lower alkynyl(s), halogen(s), or aryl(s); acyl; or cyclo(lower)alkyl; R?2 and R3¿ may be linked together to form lower alkylene, R4 is hydrogen; lower alkyl; halogen; or lower alkylthio; X is lower alkylene which may be substituted with heterocyclic ring containing nitrogen(s), halogen(s), hydroxy(s), phenyl(lower)alkylidene(s), N-mono(or di)-(lower)alkylamino(lower)alkylidene(s), hydroxy(lower)alkylidene(s), or lower alkoxyimino(s); cyclo(lower)alkylidene; carbonyl; or thio; Y is lower alkylene which may be substituted with oxo, or thioxo; and X and Y may be linked together to form lower alkenylene, X and N are respectively bonded to the adjoining carbon atoms on the benzene ring, or a pharmaceutically acceptable salt thereof, which are useful as a medicament. |