Process for preparing 4-aminodiphenylamine intermediates

Details Process for preparing 4-aminodiphenylamine intermediates Process for preparing 4-aminodiphenylamine intermediates

2007-02-27

2007-02-27

Davis, Brian (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S420000, C564S421000, C564S422000, C564S423000, C564S433000, C564S434000

Reexamination Certificate

active

10444524

ABSTRACT:
The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps:a. bringing an aniline or aniline derivative and nitrobenzene into reactive contact; andb. reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising a strong organic base, or equivalent thereof, and an oxidant comprising hydrogen peroxide in an amount of from about 0.01 to about 0.60 moles of hydrogen peroxide to moles of nitrobenzene.

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Banerjee et al. : “Heterogeneous Catalytic Transfer Hydrogenation of 4-Nitrodiphenylamine to p-Phenylenediamines,” J. Chem. Soc. Chem. Commun., (1988) p. 1275-1276.

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