Preparation of p-aminodiphenylamines

Details Preparation of p-aminodiphenylamines Preparation of p-aminodiphenylamines

1980-10-29

1982-01-26

Doll, John

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

Organic compounds

Amino nitrogen containing

564410, 564421, 564422, 564437, C07C 8511, C07C 8524, C07C 8526

Patent

active

043130020

ABSTRACT:
A method of preparing p-aminodiphenylamines from diphenylamines is described whereby neither the N-nitrosodiphenylamine or the p-nitrosodiphenylamine need be isolated. The method rests on the discovery that alkali metal salts of p-nitrosodiphenylamines are soluble in non-aqueous organic solvent systems consisting of certain aromatic hydrocarbons and saturated aliphatic alcohols, and that such salts can be readily hydrogenated in their non-aqueous solution to the corresponding p-aminodiphenylamine.

REFERENCES:
patent: 2974169 (1961-03-01), Newby et al.
patent: 3728392 (1973-04-01), Levy
patent: 3729512 (1973-04-01), L'Eplattenier et al.
Augustine, "Catalytic Hydrogenation," p. 95 (1965).

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