Recherches sur les dérivés de la 1,2,3,4-tétra-hydro-2-naphtylamine présentant les propriétés sympatholytiques et ocytociques des alcaloïdes de l'ergot

Some pharmacological effects of 1,2,3,4-tetrahydro-2-naphthylamine (beta-tetra) and its secondary N-alkyl derivativex

Some effects of 1, 2, 3, 4-tetrahydro-2-naphthylamine (β-tetra, β-tetrahydronaphthylamine, 2-aminotetralin) and four of its secondary N-alkyl derivatives on blood pressure in the cat and in the pithed rat are described. Pressor responses were obtained with β-tetra in both preparations. The introduction of an β-methyl group to form 1, 2, 3, 4-tetrahydro-2-naphthylmethylamine led to a decrease in pressor potency in both species. The substitution of higher alkyl groups yielded compounds which were depressor in the cat and had markedly reduced pressor potency in the pithed rat. Increases in substituent chain length resulted in slight decreases in adrenaline-blocking potency and slight decreases in the tendency of the compounds to depress breathing. Experiments with β-tetra in reserpine-treated, adrenalectomized and hexamethonium-treated animals led to the conclusion that the pressor effect of 1, 2, 3, 4-tetrahydro-2-naphthylamine is mediated by an action at the sympathetic neuron resulting in the release of noradrenaline.