| 摘要 |
Process for the selective carbonylation of conjugated 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 derivative according to the general formula: <CHEM> 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, antimony 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. f
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