Process for the preparation of diphenylamine or nucleus-substitu

Details Process for the preparation of diphenylamine or nucleus-substitu Process for the preparation of diphenylamine or nucleus-substitu

1995-06-02

1996-08-13

Burn, Brian M.

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

Organic compounds

Amino nitrogen containing

564433, 564435, C07C20918

Patent

active

055457525

ABSTRACT:
A processes for the preparation of diphenylamine or a nucleus-substituted derivative thereof, which comprise, upon feeding into a reaction system a phenol compound and reacting in the reaction system a cyclohexanone compound with an aniline compound in the presence of a hydrogen transfer catalyst and a catalytic amount of the cyclohexanone compound corresponding to the phenol compound while using the phenol compound as a hydrogen acceptor and forming the cyclohexanone compound in the reaction system, (1) conducting reaction while adding dropwise the aniline compound and (2) employing a hydroxide, carbonate or bicarbonate of an alkali metal and/or alkaline earth metal when the hydrogen transfer catalyst is one of noble metals of Group VIII of the periodic table, respectively.

REFERENCES:
patent: 4046810 (1977-09-01), Moggi et al.
patent: 4124639 (1978-11-01), Lutz et al.
patent: 4200451 (1980-04-01), Vogel et al.
patent: 4804783 (1989-02-01), Nagata et al.
patent: 4902661 (1990-02-01), Immel et al.
patent: 4952731 (1990-08-01), Nagata et al.
patent: 5117063 (1992-05-01), Stern et al.
patent: 5196592 (1993-03-01), Immel et al.
DATABASE WPI, Week 8921, AN 89-156791, Apr. 18, 1989.
DATABASE WPI, Week 8639, AN 86-255392, Aug. 15, 1986.

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