Patent ID: 6706912
Filing Date: 2004-03-16
Classification: B01J,C07C

Abstract:
A process for the carbonylation of ethylenically unsaturated compounds having 3 or more carbon atoms comprising reacting carbon monoxide and at least one hydroxyl group containing compound in the presence of a catalyst system comprising:(a) a source of palladium cations; (b) a bidentate diphosphine of formula I, R1R2>Pâ€”R3â€”Râ€”R4â€”P5R6â€ƒâ€ƒ(I) wherein P represents a phosphorus atom; R1, R2, R5 and R6 independently represent the same or different optionally substituted organic groups containing a tertiary carbon atom through which the group is linked to the phosphorus atom, R3 and R4 independently represent optionally substituted alkylene groups and R represents an optionally substituted aromatic group; and(c) a source of anions derived from an acid having a pKa less than 3, as measured at 18Â° C. in an aqueous solution; in the presence of an aprotic solvent.