The invention discloses a synthesis method of 5, 6, 7, 8-tetrahydro-5, 5, 8, 8-tetramethyl-2-
naphthylamine. The synthesis method comprises the following steps: the 5, 6, 7, 8-tetrahydro-5, 5, 8, 8-tetramethyl-2-naphthoamide reacts with
sodium hydroxide in a high
boiling point solvent; a protective group of the amino group is removed at temperature between 100 DEG C and 200 DEG C; a reaction solution is deposited with water and filtered; a
solid product obtained is recrystallized to obtain the 5, 6, 7, 8-tetrahydro-5, 5, 8, 8-tetramethyl-2-
naphthylamine. The method is
environmentally friendly,has little
pollution, low cost, simple operation, high safety, high reaction yield and high transformation rate reaching more than 80 percent and requires no adoption of expensive Pd-C catalysts and no
catalytic hydrogenation. If necessary, the obtained 5, 6, 7, 8-tetrahydro-5, 5, 8, 8-tetramethyl-2-
naphthylamine can be condensed and hydrolyzed to obtain
tamibarotene.