Autoxidation of bis(ortho dialkyl-phenoxy)benzophenones

Details Autoxidation of bis(ortho dialkyl-phenoxy)benzophenones Autoxidation of bis(ortho dialkyl-phenoxy)benzophenones

1985-12-20

1986-09-16

Reamer, James H.

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

Organic compounds

Oxygen containing

C07C 49784

Patent

active

046124004

ABSTRACT:
A method is described for autoxidizing a novel class of bis(ortho dialkyl-phenoxy)benzophenones directly to their corresponding dianhydrides. The method comprises autoxidizing the benzophenones in a solution of an aliphatic monocarboxylic acid having 3 to 8 carbon atoms with oxygen in the presence of a heavy metal oxidation catalyst and a promoter at a temperature of at least about 120.degree. C. to form the dianhydride.
The dianhydrides are used in the preparation of organic high temperature polymers such as polyetherimides.

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Paparinska et al, Khim Tekhnol Khim 1974, 2, 86-97, (Chemical Abstracts, 82, 124995r, 1975).

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