Process for the manufacture of derivatives of benzoic acid

Details Process for the manufacture of derivatives of benzoic acid Process for the manufacture of derivatives of benzoic acid

1989-07-20

1991-02-05

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

562417, 562 56, 562414, C07C 5116

Patent

active

049906593

ABSTRACT:
A process for the manufacture of benzoic acid derivatives is described. The process is based on the reaction of a toluene derivative in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transition metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br.sup.-, F.sup.-, Cl.sup.-, OH.sup.-, CH.sub.3 COO.sup.- or HSO.sub.4.sup.31 . The benzoic acid derivatives produced are characterized by their very high purity and high conversion reaching generally values of above 95%.

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Sasson, J. Org. Chem., 51, pp. 2880-2883 (1986).
Chem. Abst., 93:71220c.

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