Process for the preparation of 4-nitrodiphenylamines

Details Process for the preparation of 4-nitrodiphenylamines Process for the preparation of 4-nitrodiphenylamines

1985-11-18

1987-05-12

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 8504

Patent

active

046652337

ABSTRACT:
An improved process for the preparation of 4-nitrodiphenylamines by the reaction of 4-nitrohalobenzenes with primary aromatic amines in the presence of potassium carbonate and copper compounds is characterized in that sulpholane dimethylsulphone, dimethylacetamide, diethylacetamide, tetramethylurea, tetraethylurea or mixtures thereof are used as solvents and 3 to 5 mol of amine are used per mol of halogenated nitrobenzene, from 1.2 to 2 mol of said amine being added before the beginning of the reaction and the remainder during the reaction at such a rate that the molar excess of unreacted amine over unreacted halogenated nitrobenzene is constantly at least 100%.

REFERENCES:
patent: 3055940 (1962-09-01), Merz
patent: 3121736 (1964-02-01), Luvisi et al.
patent: 3277175 (1966-10-01), Clemens
patent: 4122118 (1978-10-01), George et al.
patent: 4155936 (1979-05-01), Sturm
patent: 4404400 (1983-09-01), Heise et al.

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