Preparation of 4,4'-dinitrodiphenylamine from urea and nitrobenz

Details Preparation of 4,4'-dinitrodiphenylamine from urea and nitrobenz Preparation of 4,4'-dinitrodiphenylamine from urea and nitrobenz

2000-02-23

2000-12-05

Barts, Samuel

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

Organic compounds

Amino nitrogen containing

C07C20900

Patent

active

061569321

ABSTRACT:
A method for preparing 4,4'-dinitrodiphenylamine, including reacting urea and nitrobenzene in a polar organic solvent in the presence of a base at a temperature of room temperature to 100.degree. C. The method employs a relatively cheap urea and nitrobenzene as the raw materials, and also employs a relatively cheap base, thereby decreasing the manufacturing costs. Moreover, the method does not produce by-products, thus eliminating a need for a post-treating process. Additionally, the method is advantageous in that the production of 4,4'-dinitrodiphenylamine can be achieved in high yield and selectivity even under non-intensive reaction conditions by appropriately controlling the amounts of urea and nitrobenzene.

REFERENCES:
patent: 4990673 (1991-02-01), Tronich et al.
patent: 5233010 (1993-08-01), Stern et al.
patent: 5453541 (1995-09-01), Stern et al.

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