Process for the carbonylation of conjugated dienes

Details Process for the carbonylation of conjugated dienes Process for the carbonylation of conjugated dienes

C - Chemistry, Metallurgy

07

C

260/520, 252/91,

C07C 67/38 (2006.01) C07C 69/533 (2006.01)

Patent

CA 1313177

T 111 A B S T R A C T PROCESS FOR THE CARBONYLATION OF CONJUGATED DIENES Process for the selective carbonylation of con- jugated dienes and in particular 1,3-butadiene, in the presence of a hydroxyl group containing compound in the liquid phase and in the presence of a catalyst system to be prepared by combination of: (a) palladium or a compound thereof, (b) an organic phosphorus, antimony or arsenic deri- vative according to the general formula: Image I wherein R1 represents an aryl group substituted with one or more electron-attracting groups and R2 and R3 each represent an optionally substituted aryl group wherein Q represents phosphorus, anti- mony or arsenic, preferably phosphorus, (c) a substituted benzoic acid with a pKa 4, preferably provided with one or more electron-attracting substituents and/or forming part of a larger condensed aromatic ring system, such as 2,6-dichlorobenzoic acid or 9-anthracenecarboxylic acid, and catalyst systems referred to hereinabove. T1.T111

551899

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