New amino-pyrroloindole and amino-pyridazinoindole derivatives, are tyrosine hydroxylase inducers, useful e.g. for treating anxiety, depression or memory loss

摘要

Amino-pyrrolo(1,2-a)indole and amino-pyridazino(1,6-a)indole derivatives (I) are new. Fused indole derivatives of formula (I) (including enantiomers and diastereomers) and their N-oxides and acid or base addition salts are new. X : CO or -N(R 10)-CO- (bonded to N at the left-hand terminal); R 1H, alkyl, aminoalkyl, hydroxyalkyl or arylalkyl; R 2 - R 4H, alkyl, aminoalkyl or hydroxyalkyl; or R 1 + R 2 or R 3 + R 4additional C-C bond; R 5, R 6H or alkyl; R 7, R 8H; or alkyl, alkenyl or alkynyl (all optionally substituted (os) by one or more of OH, CN, alkoxy and NR 13R 14); or R 5 + R 8 or R 7 + R 8group completing a 5-7 membered heterocycle (os by R 11), provided that at least one heterocycle-completing group as R 5 + R 8 or R 7 + R 8 must be present; R 9H, halo, alkyl (os by one or more of halo, OH, alkoxy or NR 15R 16), alkoxy, OH, CN, NO 2, polyhaloalkyl or NR 15R 16; n : 0-4; R 10H, alkyl (os by one or more of halo, OH, alkoxy or NR 15R 16), alkenyl, arylalkyl or polyhaloalkyl; R 11COOT or CH 2OU'; T, U' : H or alkyl; R 13, R 14H or alkyl; or NR 13R 14os 4-8 membered heterocycle, optionally containing a double bond or a second O or N heteroatom; R 15, R 16H, alkyl or alkenyl; aryl moieties : phenyl or naphthyl (both os by one or more of halo, NO 2, NH 2, alkyl or alkoxy); 5-7 membered heterocycle : e.g. pyrrolidine, piperidine or azepane; 4-8 membered heterocycle : e.g. pyrrolidine, piperidine, azepane, piperazine or morpholine (all os by one or more of alkyl, hydroxyalkyl, alkoxyalkyl, aminoalkyl or mono- or dialkylaminoalkyl; alkyl moieties have 1-6C and alkenyl or alkynyl moieties 2-6C; the compound (3aSR,RSR)-3-benzyl-4-ethyl-2,3,3a,4-tetrahydro-benzo(b)pyrido(2,3,4-gh)pyrrolizin-5(1H)-one is excluded. Independent claims are included for the preparation of (I). [Image] ACTIVITY : Tranquilizer; Antidepressant; Nootropic; Neuroprotective; Antiparkinsonian. MECHANISM OF ACTION : Tyrosine hydroxylase (TH) inducer. (4aSR,11aSR,11bRS)-1-Methyl-1,2,3,4,4a,11,11a,11b-octahydro-pyrido(2',3':3,4)pyrrolo(1,2-a)indol-5-one (Ia) induced an increase in the TH levels in the locus coeruleus of the brain in mice after intravenous injection at a dose of 20 mg/kg.