The use is described of 6: 6: 7: 8-tetrahydro-2-naphthylamine for the synthesis of some 1: 2- 7: 8-and 3: 4-7: 8-dibenzacridines; 3-ethyl-6: 6: 7: 8-tetrahydro-2-naphthylamine has similarly been applied to the preparation of 9-ethyl-1: 2-6: 7-and 1-ethyl-3: 4-6: 7-
