FIELD: chemistry.
SUBSTANCE: invention relates to new benzimidazole derivatives with general formula 
(I), where A represents -CH2-, -C(O), -C(O)-C(Ra)(Rb)-, X represents a -CH- radical; Ra and Rb independently represent a hydrogen atom or (C1-C6)alkyl radical; R1 represents a hydrogen atom or (C1-C8)alkyl radical; R2 represents a (C1-C8)alkyl radical; R3 represents -(CH2)P-Z3, -C(O)-Z'3 or -C(O)-NH-Z"3; Z3 represents (C1-C6)alkyl, (C2-C6)alkenyl, (C1-C6)alkoxy, (C1-C6)alkylcarbonyl, (C1-C6)alkoxycarbonyl, (C1-C6)alkyl-N(RN)carbonyl, (C3-C7)cycloalkyl, aryl, arylthio or heteroaryl radical, Z3 is bonded to the -(CH2)P- through a carbon atom, heteroaryl radical, which is a 5-10- member heteroaryl, which contains 1-2 identical or different heteroatoms, chosen from sulphur, nitrogen or oxygen, and optionally substituted with one or more identical or different substitutes, chosen from halogen, nitro group or -(CH2)P'-V30-Y3; aryl radical, chosen from phenyl or naphthyl, optionally substituted with one or more identical or different substitutes, chosen from halogen, nitro group, cyano group, (C2-C6)alkenyl, pyrrolidinyl, phenyl, phenyloxy, phenylalkyloxy, 5-7- member heteroaryl, containing 1-3 nitrogen atoms and -(CH2)p'-V31-Y3; V30 represents -O-, -C(O)-, -C(O)-O- or a covalent bond; V31 represents -O-, -S-, -SO2-, -C(O)-, -C(O)-O-, -N(RN)-, -NH-C(O)- or a covalent bond; Y3 represents a hydrogen atom or (C1-C6)alkyl radical, optionally substituted with one or more identical or different halogen radicals; RN represents a hydrogen atom or (C1-C6)alkyl radical; Z3 represents a radical with a given formula (see below); Z'3 represents a phenyl radical, optionally substituted with one ore more identical or different substitutes, chosen from -(CH2)P"-V'3-Y'3; V'3 represents -O-; Y'3 represents a hydrogen atom or (C1-C6)alkyl radical; Z"3 represents a hydrogen atom or -(CH2)q-A"3 radical; A"3 represents (C1-C6)alkyl, phenyl or thienyl radical; alkyl or phenyl radical can be optionally substituted with one or more identical or different substitutes, chosen from halogen and -V"3-Y"3; V"3 represents -O-, -C(O)-, -C(O)-O- or a covalent bond; Y"3 represents a hydrogen atom or (C1-C6)alkyl radical; p is an integer from 0 to 6; p' and p" independently represent an integer from 0 to 1; q is an integer from 0 to 2; R4 represents a radical with formula -(CH2)S-R'4; R'4 represents a 5-7- member heterocycloalkyl, containing at least one nitrogen atom and optionally substituted with (C1-C6)alkyl; or a radical with formula -NW4W'4; W4 represents a hydrogen atom; W'4 represents a hydrogen atom; s is an integer from 0 to 6; in racemic or enantiomeric form or any combination of the said forms, or its pharmaceutically acceptable salt. The invention also relates to a method of obtaining a compound in paragraph 1, a pharmaceutical composition based on the said compound and its use in making a medicinal agent.
EFFECT: new benzimidazole derivatives have good affinity to certain subtypes of melanocortin receptors.
26 cl, 8 ex
