Highly fluorinated heterocycles. Part IV. The fluorination of tetrachlorothiophen, thiophen, and tetrahydrothiophen over cobaltic and manganic trifluorides and over potassium tetrafluorocobaltate(III)
作者:J. Burdon、I. W. Parsons、J. C. Tatlow
DOI:10.1039/j39710000346
日期:——
tetrafluorocobaltate(III) to give product mixtures which are similar and which consist mainly of polyfluoro-thiolans and -3-thiolens. One of the major products, 3H/4H-hexafluorothiolan, can be used to prepare tetrafluorothiophen. Manganic trifluoride behaves like potassium tetrafluorocobaltate(III) with thiophen. The mechanisms of these fluorinations are discussed and it is suggested that tetrahydrothiophen is converted
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。