Preparation of 4,4'-diaminobenzophenones

Details Preparation of 4,4'-diaminobenzophenones Preparation of 4,4'-diaminobenzophenones

1984-11-21

1985-10-29

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

564328, 548462, C07C 9710

Patent

active

045502080

ABSTRACT:
4,4'-diaminobenzophenones of the formula I ##STR1## where the rings A and B can be further substituted, are prepared by a process in which a compound of the formula II ##STR2## where the rings A, B and E can be substituted, is oxidized with aqueous nitric acid in the presence of nitrobenzene or of an alkanoic acid and under superatmospheric pressure, and the reaction product is cleaved.
The process according to the invention gives the compounds of the formula I in high yield and purity.

REFERENCES:
Fieser & Fieser, Reagents for Organic Synthesis, 1975, vol. 5, p. 474, John Wiley & Sons, NY.
Bouanane, et al., Chemical Abstracts, vol. 81, No. 19, 120139w, 1974.
Derwent Abstract, C84-128457, 1984, (DE 319650).

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