Process for preparing carboxylic acids by carbonylation of ether

Details Process for preparing carboxylic acids by carbonylation of ether Process for preparing carboxylic acids by carbonylation of ether

1994-01-27

1995-03-21

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

560 9, 560 15, 560 20, 560 21, 560 51, 560 55, 560 56, 560 60, 560100, 560105, C07C 5110

Patent

active

053997476

ABSTRACT:
A new process for preparing aryl-substituted aliphatic carboxylic acids is provided. Aryl-substituted aliphatic ether or thioether compound is reacted with carbon monoxide in aqueous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An acid such as hydrochloric acid may be added. As catalyst, a mixture of palladium or a palladium compound and a copper compound with at least one acid-stable ligand are present.

REFERENCES:
patent: 2913489 (1959-11-01), Benedictis
patent: 3769324 (1973-10-01), Paulik
patent: 5166418 (1992-11-01), Hendricks
patent: 5315030 (1994-05-01), Chochalingam

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