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.
通过将三氧化硫与来自包括六氟-2,5-二氢呋喃、六氟-2,5-二氢噻吩、二氟-2,5-二氢噻吩-2,5-二酮和四氟-2,5-二氢噻吩-2-酮的氟化前体之一反应,制备二氟马来酸酐的方法。还披露了化合物二氟-2,5-二氢噻吩-2,5-二酮和四氟-2,5-二氢噻吩-2-酮。例如,二氟马来酸酐可用作氟聚合物的组分。