Benzimidazole and imidazo-pyridine derivatives, useful in treatment of obesity, cachexia, anorexia, anxiety, depression, pain, and erectile dysfunction, have affinity for melanocortin receptors

摘要

Benzimidazole and imidazo-pyridine derivatives (I) are new. Benzimidazole and imidazo-pyridine derivatives (I), their racemic and enantiomeric forms and their mixtures and their salts are new. [Image] A : CH 2, CO or C(O)C(R a)(R b); X : C or N; R a, R bH or 1-6C alkyl; R 1, R 2H, 1-8C alkyl (optionally substituted by OH), 2-6C alkenyl or (CH 2) nX 1; X 13-7C cycloalkyl, heterocycloalkyl, aryl or heteroaryl (all optionally substituted by one or more halogen, NO 2, CN or (CH 2) n-V 1Y 1), 1-6C alkoxy or adamantyl; n : 0-6, such that when it is 0, then X 1 is neither OH nor alkoxy; or NR 1R 2heterobicycloalkyl or heterocycloalkyl (both optionally substituted by one or more S 1), 2,5-dihydro-1H-pyrrolo, 1,2,5,6-tetrahydropiperidino or a spirofused group of formula (a); S 1OH, 1-6C alkyl, 1-6C hydroxyalkyl, 1-6C alkoxycarbonyl or C(O)NV 1'Y 1'; V 1', Y 1'H or 1-6C alkyl; R 3(CH 2) p-Z 3 or C(O)Z' 3; Z 31-6C alkyl, 2-6C alkenyl, 1-6C alkoxy, 1-6C alkoxy carbonyl, 3-7C cycloalkyl or heterocycloalkyl (both optionally substituted by 1-6C alkyl), aryl (optionally substituted by one or more halogen, azido, NO 2 or (CH 2) pV 3Y 3), heteroaryl or a bicyclic group of formula (b) or (c); r : 1 or 2; V 3O, S, C(O), C(O)O, NHC(O), C(O)NR' 3, NHC(O)NR' 3 or a bond; Z' 3aryl (optionally substituted by one or more halogen, NO 2 or (CH 2) pV' 3Y' 3); V' 3O, C(O), C(O)O, C(O)NR' 3, NHC(O)NR' 3 or a bond; Y 3, Y' 3H or 1-6C alkyl (optionally substituted by one or more halogen); R' 3H, 1-6C alkyl or 1-6C alkoxy; R 4(CH 2) sR' 4; R' 4heterocycloalkyl containing at least one N (optionally substituted by 1-6C alkyl or aralkyl), heteroaryl containing at least one N (optionally substituted by 1-6C alkyl) or NW 4W' 4; W 4H or 1-8C alkyl; W' 4(CH 2) s'-Z 4; Z 4H, 1-8C alkyl (optionally substituted by one or more SZ 4), 2-6C alkenyl, 3-7C cycloalkyl (optionally substituted by one or more 1-6C alkyl), cyclohexene, heteroaryl, aryl (optionally substituted by one or more S 4) or a group (b); SZ 41-6C alkoxy, 1-6C alkylthio or OH; S 4(CH 2) s''V 4Y 4, OH, halogen, NO 2 or CN; s'' : 0-4; V 4O, S, NHC(O), N(V' 4) or a bond; V' 4H or 1-6C alkyl; Y 4H or 1-6C alkyl (optionally substituted by one or more halogen); s, s' : 0-6; with the proviso that, when R 3 = C(O)Z' 3 and R 4 = (CH 2) sNW 4W' 4 with W 4 and W' 4 representing H or alkyl, then (CH 2) s is neither ethylene nor -(CH 2)-CH((1-4C) alkyl)-. [Image] An independent claim is also included for preparation of (I). ACTIVITY : Anorectic; Immunomodulator; Tranquilizer; Antidepressant; Analgesic; Vasotropic; Dermatological; Cytostatic. MECHANISM OF ACTION : Melanocortin receptor agonists and antagonists, especially active on MC4.