Catalytic carbonylation of ethers and thioethers

Details Catalytic carbonylation of ethers and thioethers Catalytic carbonylation of ethers and thioethers

1993-09-29

1994-05-24

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560 9, 560 20, 560 21, 560 55, 560 56, 560100, 562406, C07C 6976

Patent

active

053150309

ABSTRACT:
A new process for preparing aliphatic carboxylic acid esters is provided. A substituted aliphatic ether or thioether compound is reacted with carbon monoxide in the presence of an alcohol in anhydrous conditions at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also 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: 4990658 (1991-02-01), Stahly et al.
patent: 5166419 (1992-11-01), Tokumoto
patent: 5254720 (1993-10-01), Wu
patent: 5260477 (1993-11-01), Shimizu et al.

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