Patent ID: 6087533
Filing Date: 2000-07-11
Classification: C07C

Abstract:
A process for the carbonylation of allylic butenol or a butenyl ester of a carboxylic acid and production of beta-gamma unsaturated carboxylic acid anhydride comprising the steps of:(a) reacting an allylic butenol or butenyl ester of a carboxylic acid with carbon monoxide in the presence of a rhodium-containing catalyst and a metal iodide promoter selected from the group consisting of iodides of Groups IIB, IIIA, IIIB, IVA, IVB, VIB, VIIB, and VIII of the periodic table in a C.sub.1 to C.sub.20 carboxylic acid solvent under anhydrous conditions; and(b) recovering a beta-gamma unsaturated carboxylic acid anhydride.