Preparation of unsaturated diesters by catalytic oxidative carbo

Details Preparation of unsaturated diesters by catalytic oxidative carbo Preparation of unsaturated diesters by catalytic oxidative carbo

1979-12-03

1981-07-28

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 97, C07C 6738

Patent

active

042811732

ABSTRACT:
A process for the preparation of an unsaturated diester having the formula ##STR1## 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 R.sub.1, R.sub.2, R.sub.3 and R.sub.4 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 ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as aforesaid, 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.

REFERENCES:
patent: 4039572 (1972-08-01), Funakoshi et al.
patent: 4171450 (1979-10-01), Kesling et al.

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