Indanyl-piperazine derivatives, process for their preparation and pharmaceutical compositions containing them

摘要

Indanyl-piperazine derivatives (I) are new. Indanyl-piperazine derivatives of formula (I) and their optical isomers, salts, enantiomers or diastereoisomers are new. R 3 = H and R 1+R 2 = benzene, naphthalene or quinoline (optionally substituted by H, halo or 1-6C alkyl (optionally substituted by halo)); or R 1 = H; and R 2+R 3 = benzene, naphthalene or quinoline (optionally substituted by H, halo or 1-6C alkyl (optionally substituted by halo)); n = 1-2; X = (CH 2) m-OT, (CH 2) m-NR 4T, C(O)NR 4T or (CH 2) mNR 4C(O); m = 1-6; T = 1-6C alkyl optionally substituted by OH; R 4 = H or 1-6C alkyl; A = (hetero)aryl; aryl = phenyl, biphenyl or naphthyl (optionally substituted by halo, 1-6C alkyl, 1-6C alkoxy, OH, CN or 1-6C trihaloalkyl); and heteroaryl = 5-12 membered aromatic mono- or bicyclic rings containing O, N or S heteroatoms and optionally substituted by halo, 1-6C alkyl, 1-6C alkoxy, OH or 1-6C trihaloalkyl. An independent claim is also included for preparation of (I). [Image] ACTIVITY : Antidepressant; Tranquilizer; Anorectic; Analgesic; Antiinflammatory; Neuroleptic; Antiemetic; Gastrointestinal-Gen. MECHANISM OF ACTION : Serotonin receptor inhibitor; Neurokinin-1 antagonist. The ability of (1RS)-1-[1-(3,5-difluorobenzyloxymethyl)indan-1-yl]piperazine dihydrochloride to inhibit serotonin receptor in rats was tested using biological assays. The result showed that (1RS)-1-[1-(3,5-difluoro-benzyloxymethyl)-indan-1-yl]-piperazine dichlorhydrate exhibits a pK i (negative log of inhibitory constant) value of 8.49.