abstract |
The invention relates to a process for the preparation of 5-nitro-3,4-dihydro-1 (2H) -naphthalinone,n1,5-naphthalenediamine and 1,5-naphthalenediisocyanate, the one stepncontains, in which 4- (2-nitrophenyl) -n-butyronitrile to 4- (2-nitrophenyl) -n-butyric acidnimplements. |