1,9-Dihydroxyoctahydrobenzo[c]quinolines (I), 1-hydroxyhexahydrobenzo[c]quinoline-9 (8H)-ones (II), and 1-hydroxy-tetrahydrobenzo[c]quinolines (IV) useful as CNS agents, especially as analgesics and tranquilizers, as hypotensives, as agents for the treatment of glaucoma and as diuretics; intermediates therefor (III) and derivatives thereof having the formulae <IMAGE> (I) <IMAGE> (II) <IMAGE> (III) <IMAGE> (IV) wherein R is hydroxy, alkanoyloxy having from one to five carbon atoms and hydroxymethyl; R1 is hydrogen, benzyl, benzoyl, alkanoyl having from one to five carbon atoms or -CO-(CH2)p-NR2R3 wherein p is 0 or an integer from 1 to 4; each of R2 and R3 when taken individually is hydrogen or alkyl having from one to four carbon atoms; R2 and R3 when taken together with the nitrogen to which they are attached form a 5- or 6-membered heterocyclic ring (piperidino, pyrrolo, pyrrolidino, morpholino and N-alkylpiperazino having from one to four carbon atoms in the alkyl group); R4 is hydrogen, alkyl having from 1 to 6 carbon atoms and -(CH2)z-C6H5 wherein z is an integer from 1 to 4; R5 is hydrogen, methyl or ethyl; R6 is hydrogen, -(CH2)y-carbalkoxy having from 1 to 4 carbon atoms in the alkoxy group wherein y is 0 or an integer from 1 to 4; carbobenzyloxy, formyl, alkanoyl having from two to five carbon atoms, alkyl having from one to six carbon atoms; -(CH2)x-C6H5 wherein x is an integer from 1 to 4; and -CO(CH2)x-1-C6H5; RO is oxo, methylene or alkylenedioxy having from two to four carbon atoms; R' is R or R0; Z is (a) alkylene having from one to nine carbon atoms; (b) -(alk1)m-X-(alk2)n-wherein each of (alk1) and (alk2) is alkylene having from one to nine carbon atoms, with the proviso that the summation of carbon atoms in (alk1) plus (alk2) is not greater than 9; each of m and n is 0 or 1; X is 0, S, SO or SO2; and W is hydrogen, methyl, <IMAGE> wherein W1 is hydrogen, chloro or fluoro; pyridyl, piperidyl, cycloalkyl having from 3 to 7 carbon atoms, or monosubstituted cycloalkyl wherein the substituent is <IMAGE> wherein W2 is hydrogen, chloro or fluoro; and pharmaceutically-acceptable acid addition salts of compounds of formulae I, II and IV and the ketals of compounds of formulae II, III and IV wherein the ketal moiety has from two to four carbon atoms.
9-Hydroxyoctahydrobenzo [c]quinolines, analgesic compositions containing them and processes for producing analgesia with them