Method for producing tetracarboxylic acids

Details Method for producing tetracarboxylic acids Method for producing tetracarboxylic acids

2006-04-27

2010-11-16

Zucker, Paul A (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07834211

ABSTRACT:
A process for preparing tetracarboxylic acids of the general formula Ior salts thereof, wherein at least one compound of the general formula II a or II b(a) is first reacted with at least one epoxidation reagent and(b) then oxidized with nitric acid or at least one nitrogen oxide,where the variables are defined as follows:R1, R2are the same or different and are selected from hydrogen, phenyl and C1-C10-alkyl.

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Franz, John E., “Mechanism of the Nitric Acid Oxidation of Olefins”, J. Org Chem., vol. 30, pp. 1488-1491, 1965.

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