PIPERIDINE DERIVATIVES, PHARMACEUTICAL COMPOSITION BASED ON THEREOF AND METHOD FOR TREATMENT OF HIV-INFECTION

FIELD: organic chemistry, medicine, virology. ^ SUBSTANCE: invention relates to new derivatives of piperidine of the general formula (II): or their pharmaceutically acceptable salts wherein Xa means -C(R13)2-, -C(R13)(R19)-, -C(O)-, and others; Ra means R6a-phenyl or phenyl substituted with methylsulfonyl; R1 means hydrogen atom or (C1-C6)-alkyl; R2 means R7-, R8-, R9-phenyl wherein R7-, R8 and R9 mean substituted 6-membered heteroaryl and others; R3 means R10-phenyl, pyridyl and others; R4 means hydrogen atom, (C1-C6)-alkyl, fluoro-(C1-C6)-alkyl; R6a means from 1 to 3 substitutes taken among the group involving hydrogen, halogen atom, -CF3 and CF3O-; R7 and R8 mean (C1-C6)-alkyl and others; R9 means R7, hydrogen atom, phenyl and others; R10 means (C1-C6)-alkyl, -NH2 or R12-phenyl wherein R12 means hydrogen atom, (C1-C6)-alkyl and others; R13, R14, R15 and R16 mean hydrogen atom or (C1-C6)-alkyl; R17 and R18 in common with carbon atom to which they are bound form spirane ring comprising from 3 to 6 carbon atoms; R19 means R6-phenyl wherein R6 means R6a or methylsulfonyl; R20, R21 and R22 mean hydrogen atom or (C1-C6)-alkyl; R23 means (C1-C6)-alkyl under condition that if Ra means phenyl substituted with methylsulfonyl then Xa can mean the group only. Compounds of the formula (II) possess properties of CCR5-antagonist and can be used in medicine in treatment of HIV-infection. ^ EFFECT: improved method for treatment, valuable medicinal properties of compounds and composition. ^ 15 cl, 1 dwg, 12 tbl, 15 ex