Abstract: Lower-alkyl 1-R.sub.1 -3-R.sub.5 CO-4a.alpha.-R.sub.3 -5.alpha.-R.sub.4 -6-R.sub.2 "-7-R.sub.2 -8-R.sub.2 '-9-R.sub.2 '"-1,2,3,4,4a,5,10,10a-octahydro-2,5-methanobenzo[g]-quinoline-3-carboxyla tes, useful as intermediates for the preparation of 3-R.sub.1 -6(eq)-R.sub.4 -7-R.sub.2 "-8-R.sub.2 -9-R.sub.2 '-10-R.sub.2 '"-11(ax)-R.sub.3 -1,2,3,4,5,6,-hexahydro-11(eq)--CH.sub.2 CH.sub.2 COR.sub.5 --2,6-methano-3-benzazocines, useful as analgesics and narcotic antagonists, are prepared by acylation of an appropriate lower-alkyl 1-R.sub.1 -4a.alpha.-R.sub.3 -5.alpha.-R.sub.4 -6-R.sub.2 "-7-R.sub.2 -8-R.sub.2 '-9-R.sub.2 '"-1,2,3,4,4a,5,10,10a-octahydro-2,5-methanobenzo[g]quinoline-3-carboxylat e or carboxylation of an appropriate 1-R.sub.1 -3-COR.sub.5 "-4a.alpha.-R.sub.3 -5.alpha.-R.sub.4 -6-R.sub.2 "-7-R.sub.2 -8-R.sub.2 '-9-R.sub.2 '"-1,2,3,4,4a,5,10,10a-octahydro-2,5-methanobenzo[g]quinoline.

Abstract: 6(EQ)-R.sub.4 -1,2,3,4,5,6-Hexahydro-3-R.sub.1 -11(ax)-R.sub.3 -11(eq)-CH.sub.2 Z-2,6-methano-3-benzazocines, useful as analgesic agents and narcotic antagonists, and 1-R.sub.1 -2-Q-4a.alpha.-R.sub.3 -5.alpha.-R.sub.4 -1,2,3,4,4a,5,10,10a-octahydro-3,5-ethano- (and 3,5-ethano) benzo[g]quinolines, useful as analgesic agents, prepared by heating, with formic acid in an organic solvent or with certain ammonium formates in the absence of a solvent, certain 1,2,3,4,4a,5,10,10a-octahydro-2,5-methanobenzo[g]quinolines, the latter prepared by acid catalyzed cyclization of a 3-benzyl-2-azabicyclo[2.2.2]-oct-5-ene.

Abstract: 1,2,3,4,4a,5,10,10a-Octahydro-5-(Y.sup.3)-5-(Y.sup.4)-benzo[g]quinolines and 1,2,3,4,4a,9b-hexahydro-5-(Y.sup.3)-5-(Y.sup.4)-5H-indeno[1,2,b]pyridi nes wherein Y.sup.3 and Y.sup.4 are hydrogen, alkyl or phenyl, which are useful as antagonists of strong analgesics, are obtained by cyclizing derivatives of 2-(phenyl or benzyl)-.alpha.-(Y.sup.3)-.alpha.-(Y.sup.4)-3-piperidinemethanols. The latter are obtained from corresponding 3-piperidinecarboxylic acids.

Abstract: 1,2,3,4,4a,5,10,10a-octahydro-5-(Y.sup.3)-5-(Y.sup.4)-benzo[g]quinolines and 1,2,3,4,4a,9b-hexahydro-5-(Y.sup.3)-5-(Y.sup.4)-5H-indeno[1,2,b]pyridi nes wherein Y.sup.3 and Y.sup.4 are hydrogen, alkyl or phenyl, which are useful as antagonists of strong analgesics, are obtained by cyclizing derivatives of 2-(phenyl or benzyl)-.alpha.-(Y.sup.3)-.alpha.-(Y.sup.4)-3-piperidinemethanols. The latter are obtained from corresponding 3-piperidinecarboxylic acids.

Abstract: 6(EQ)-R.sub.4 -1,2,3,4,5,6-Hexahydro-3-R.sub.1 -11(ax)-R.sub.3 -11(eq)-CH.sub.2 Z-2,6-methano-3-benzazocines, useful as analgesic agents and narcotic antagonists, and 1-R.sub.1 -2-Q-4a.alpha.-R.sub.3 -5.alpha.-R.sub.4 -1,2,3,4,4a,5,10,10a-octahydro-3,5-etheno- (and 3,5-ethano) benzo[g]quinolines, useful as analgesic agents, prepared by heating, with formic acid in an organic solvent or with certain ammonium formates in the absence of a solvent, certain 1,2,3,4,4a,5,10,10a-octahydro-2,5-methanobenzo[g]quinolines, the latter prepared by acid catalyzed cyclization of a 3-benzyl-2-azabicyclo[2.2.2]oct-5-ene.