Amino-tetra:hydro-naphthalene prodn. - by catalytic hydrogenation of di:amino-naphthalene, for use in syntheses of azine-, oxazine-, thiazine- and azo-dyes

摘要

Prepn. of 5-Amino-1,2,3,4-tetrahydronaphthalene (5-aminotetralin) (I): comprises reacting a diaminonaphthalene (II) (contg. one NH2 gp. in alpha-position in each ring) with H2 at 125-250 degrees C under elevated press. (pref. 10-250 atm.) in presence of a catalyst.