Process for producing biphenylpolycarboxylic acid ester

Details Process for producing biphenylpolycarboxylic acid ester Process for producing biphenylpolycarboxylic acid ester

1974-08-16

1976-09-28

Weinberger, Lorraine A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260475R, C07C 6700

Patent

active

039831590

ABSTRACT:
The oxidative coupling of benzenecarboxylic acid esters to form the corresponding biphenylpolycarboxylic acid esters, comprising contacting a benzenecarboxylic acid ester having at least one hydrogen atom bonded to the nuclear carbon atom of the benzene ring, such as methyl benzeate, with molecular oxygen in a liquid phase using a catalyst comprising at least one compound selected from organic carboxylates of palladium, such as palladium acetate and .beta.-dikete complexes of palladium, such as acetylacetone-palladium complex. Use of at least one zirconium compound, such as zirconium oxystearate in conjunction with the catalyst gives rise to an increased catalytic activity.

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Ichikawa et al., Chem. Abst., 70:96310v, (1969).

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