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US 4,393,224 AGranted
Telomerization of butadiene and carbon dioxide
AssigneeImperial Chemical Industries PLC
InventorJames A. Daniels
Life of this patent
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Abstract
A process for the manufacture of 2-ethylidenehept-6-en-5-olide which comprises reacting in a liquid medium 1,3-butadiene with carbon dioxide in the presence of a palladium complex catalyst and a tertiary amine.
Claims12
A process for the manufacture of 2-ethylidenehept-6-en-5-olide which comprises reacting in a liquid medium 1,3-butadiene with carbon dioxide in the presence of
- (a) a palladium complex catalyst which is a complex of palladium with a phosphorus (III) compound or pyridine or a substituted pyridine, and
- (b) a tertiary amine having a pKa value in the range 10 to 14.
Dependencies are inferred from the claim text.