Carbonylation of conjugated dienes
AssigneeShell Oil Company
InventorsEit Drent, Willem W. Jager
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Abstract
The invention relates to a process for the preparation of alkenoic acid derivatives by reaction of an aliphatic conjugated diene with carbon monoxide and a hydroxyl group-containing compound. The reaction is carried out in a liquid reaction medium of controlled polarity in the presence of a catalyst system containing a palladium compound, a multidentate phosphine ligand, and optionally a protonic acid. By controlling the polarity of the reaction medium to a calculated dielectric constant .epsilon..sub.calc of below a value of 8, higher reaction rates are achieved.
Claims10
A process for the preparation of alkenoic acid derivatives comprising reacting an aliphatic conjugated diene with carbon monoxide and a hydroxyl group-containing compound in a reaction medium having a calculated dielectric constant at 25.degree. C. .epsilon..sub.calc of below a value of 8 in the presence of a catalyst system comprising a palladium compound, a multidentate phosphine ligand, and optionally a protonic acid.
Dependencies are inferred from the claim text.