Process for the preparation of difluoromaleic anhydride and intermediate
申请人:E. I. Du Pont de Nemours and Company
公开号:US05235069A1
公开(公告)日:1993-08-10
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.
Process for the preparation of difluoromaleic anhydride
申请人:E. I. Du Pont de Nemours and Company
公开号:US05112993A1
公开(公告)日:1992-05-12
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. Difluoromaleic anhydride is useful for example as a component of fluoropolymers.