四氯噻吩与三氟化钴反应生成聚氯多氟丁烷和仅少量的环状硫化合物。它与四氟钴酸钾(III)反应,主要生成3,4-二氯四氟-3-硫代菲林,几乎没有(如果有的话)开环产物。噻吩和四氢噻吩被四氟钴酸钾(III)氟化,得到相似的产物混合物,主要由多氟噻吩和-3-噻吩组成。3 H / 4 H-六氟噻吩是主要产品之一,可用于制备四氟噻吩。三氟化锰的行为类似于四氟钴酸钾(III)与噻吩。讨论了这些氟化的机理,并建议四氟化噻吩在氟化之前先转化为噻吩。
四氯噻吩与三氟化钴反应生成聚氯多氟丁烷和仅少量的环状硫化合物。它与四氟钴酸钾(III)反应,主要生成3,4-二氯四氟-3-硫代菲林,几乎没有(如果有的话)开环产物。噻吩和四氢噻吩被四氟钴酸钾(III)氟化,得到相似的产物混合物,主要由多氟噻吩和-3-噻吩组成。3 H / 4 H-六氟噻吩是主要产品之一,可用于制备四氟噻吩。三氟化锰的行为类似于四氟钴酸钾(III)与噻吩。讨论了这些氟化的机理,并建议四氟化噻吩在氟化之前先转化为噻吩。
1H,2H-octafluorocyclohexene, the conversion of -CHCH- into -CHCF- by fluorination over KCoF4 takes place by saturation to -CHFCHF- followed by dehydrofluorination, and not by direct replacement of a vinylic hydrogen.
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.