Process for the preparation of carboxylic acids and/or esters

C - Chemistry – Metallurgy – 07 – C

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260/495.1, 260/5

C07C 51/12 (2006.01) C07C 53/08 (2006.01) C07C 69/14 (2006.01)

Patent

CA 1218999

A B S T R A C T PROCESS FOR THE PREPARATION OF CARBOXYLIC ACIDS AND/OR ESTERS A process for the preparation of carboxylic acids and/or esters by reaction of an alcohol with carbon monoxide in the presence of a rhodium compound, an iodide and/or bromide source and a phosphorus, arsenic or antimony-containing compound as promoter, characterized in that the reaction is carried out in the presence of a compound of the formula Image I whexein X represents phosphorus, arsenic or antimony and Y oxygen, sulphur or selenium, and either a and b, independent of one another, are 0 or 1, R1 represents hydrogen or an unsubstituted or substituted hydrocarbon group and R2 and R3 each represent an unsubstituted or substituted hydrocarbon group, or a and b are 0 and R2 and R3 together with X form a heterocyclic group and R1 represents hydrogen or an unsubstituted or substituted hydro- carbon group, or in the presence of a complex of a compound of formula I with a hydrocarbon iodide or bromide, an acyl iodide or bromide or hydrogen iodide or bromide. CQRH04/EO

443718

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