C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/480.6, 260/4
C07C 69/593 (2006.01)
Patent
CA 1154033
ABSTRACT OF THE DISCLOSURE A process for the preparation of an unsaturated diester having the formula Image wherein R is alkyl having 1 to 8 carbon atoms or aralkyl having 6 carbon atoms in the ring and from 1 to 4 carbon atoms in the alkyl moiety, and R1, R2, R3 and R4 are the same or different and are each hydrogen, halogen, alkyl having 1 to 4 carbon atoms or aryl having 6 carbon atoms in the ring, by reacting carbon monoxide and oxygen with a diolefin having the formula Image wherein R1, R2, R3 and R4 are as afor? ?aid, in the presence of a catalytic amount of a platinum group metal compound, a copper or iron oxidant salt compound, a soluble vanadium salt and a stoichiometric amount of a dehydrating agent. Optionally, an anhydrous-halogen containing acid may be included. Alternatively, a ligand or coordination complex compound of the metal salt compound, and catalytic quantities of an alcohol may be employed.
359759
Atlantic Richfield Company
Osler Hoskin & Harcourt Llp
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