Carbonylation process
AssigneeShell Oil Company
InventorEit Drent
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Abstract
An improved process for the carbonylation of aryl halides comprises contacting the aryl halide with carbon monoxide under carbonylation conditions in the presence of a co-reactant, a base, and a catalyst system formed from a source of palladium and a bidentate phosphine ligand wherein at least one monovalent phosphorus substituent is aromatic and is substituted on at least one aromatic ring carbon atom with an electron-withdrawing group.
Claims11
In the process of carbonylating an aryl halide by contacting the aryl halide under carbonylation conditions with carbon monoxide and a hydrogen-containing co-reactant in the presence of a base and a catalyst system formed from a source of palladium and a phosphine ligand, the improvement of using as the phosphine ligand a bidentate phosphine ligand wherein at least one monovalent phosphorus substituent is aromatic substituted on a ring carbon atom by an electron-withdrawing group.
In the process of carbonylating an aryl chloride by contacting the aryl chloride under carbonylating conditions with carbon monoxide and hydrogen or alkanol in the presence of a base and a catalyst system formed from a source of palladium and a phosphine ligand, the improvement of using as the ligand a bidentate phosphine ligand of the formula ##STR3## wherein R independently is aromatic substituted on at least one ring carbon atom ortho or para to the ring carbon atom through which the R is bonded to the phosphorus with alkoxy or dialkylamino, and R' is a divalent hydrocarbyl linking group of up to 10 carbon atoms inclusive with from 2 to 4 carbon atoms inclusive in the bridge.
Dependencies are inferred from the claim text.