Preparation of 1,2,3-Naphthalenetriamine, 1,2,5,6- and 1,2,7,8-Naphthalenetetramine, and 5,6,7,8-Quinolinetetramine and -Isoquinolinetetramine by Reduction of the Fused 1,2,5-Thiadiazole Ring
by-product in the reduction of 1a. The expected 1,2,3,4-naphthalenetetramine (4c) was not obtained in the reduction of 1c at room temperature and the 1,2,3-triamine 8 was formed in 27% yield. The intermediary formation of 4c was confirmed by acetylating the crude reduction mixture of 1c, giving tetraacetyl derivative 11. The reduction of naphthotris[1,2,5]thiadiazole 3 afforded 4,5-diamine 16 in 44% yield
The chlorination of the N-acetyl derivatives of the fourteen possible nitronaphthylamines has been studied under a variety of conditons. Both substitution and addition processes occur; the latter have not been investigated in any detail. The reactivity and mode of substitution of the N-acetylnitronaphthylamines are compared to the behaviour of the parent naphthylamines, and also to other corresponding