Manufacture of bicyclo[2,2,2]oct-7-ene 2,3,5,6-tetracarboxylic a

Details Manufacture of bicyclo[2,2,2]oct-7-ene 2,3,5,6-tetracarboxylic a Manufacture of bicyclo[2,2,2]oct-7-ene 2,3,5,6-tetracarboxylic a

1976-11-19

1978-04-25

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30793

Patent

active

040862500

ABSTRACT:
Bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic acid dianhydride is manufactured by reacting 3,5-cyclohexadiene-1,2-trans-dicarboxylic acid with maleic acid in the presence of anhydrides of low molecular weight alkanecarboxylic acids at from 50.degree. to 150.degree. C. The 3,5-cyclohexadiene-1,2-trans-dicarboxylic acid, in the anhydride of the low molecular weight alkanecarboxylic acid, and in the presence of water-soluble salts of the alkali metals, of the alkaline earth metals or of zinc, manganese or iron, in which salts the anion contains oxygen, is first heated to the reaction temperature and the maleic anhydride is then added.

REFERENCES:
patent: 3125585 (1964-03-01), Yates
patent: 3522277 (1970-07-01), Suter et al.
Cassidy, Technique of Organic Chemistry, vol. 5, (Adsorption and Chromatography), Interscience Publishers, Inc., New York, (1951), pp. 188 to 198.

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