Process for the preparation of difluoromaleic anhydride and inte

Details Process for the preparation of difluoromaleic anhydride and inte Process for the preparation of difluoromaleic anhydride and inte

1991-02-14

1993-08-10

Russell, Mark

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D33332

Patent

active

052350690

ABSTRACT:
A process for producing difluoromaleic anhydride by reacting sulfur trioxide with a fluorinated precursor selected from the group consisting of hexafluoro-2,5-dihydrofuran, hexafluoro-2,5-dihydrothiophene, difluoro-2,5-dihydrothiophene-2,5-dione and tetrafluoro-2,5-dihydrothiophene-2-one. Also disclosed are the compounds difluoro-2,5-dihydrothiophene-2,5-dione and tetrafluoro-2,5-dihydrothiophene-2-one.

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