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5-卤-3-氧杂-全氟戊磺酰氟(1)依次用苛性钾、浓硫酸和五氧化二磷处理可顺利地得到相应的磺酸和磺酸酐.在吡啶存在下,[I(CF_2)_2O(CF_2)_2SO_2]_2O(3)与醇反应得磺酸酯(6).1在发烟硫酸作用下,可转化成酰氟9.随着反应温度的不同,9水解为酸10和/或二元酸11.氟羰基全氟甲磺酰氟的水解也有类似现象.醇与9的酰氟基反应得羧酸酯,而不与磺酰氟基反应.但可进一步转化为磺酸酯.由9与F~-生成的全氟烷氧基阴离子-O(CF_2)_2O(CF_2)_2SO_2F与活泼的卤代烷作用得醚.还研究了5-卤-3-氧杂-全氟戊磺酰氟与三氯化铝的作用,在无水三氯化铝存在下对9进行了芳烃的Friedel-Crafts酰基化,以四氯化碳为溶剂并改变加料顺序,可提高酮的产率.
5-Halo-3-oxa-perfluoropentanesulfonyl fluoride (1) The corresponding sulfonic acids and sulfonic anhydrides can be smoothly obtained by treatment with caustic potash, concentrated sulfuric acid and phosphorus pentoxide in the presence of [I (CF2) _2O (CF2) _2SO_2] _2O (3) can react with alcohol to form sulfonate (6) .1 It can be converted to acyl fluoride under the action of oleum. 9 With the different reaction temperature, 9 is hydrolyzed to acid 10 and / or dibasic acid 11. There is a similar phenomenon with the hydrolysis of fluorocarbon perfluoromethanesulfonyl fluoride The alcohol reacts with the acyl fluoride group of 9 to give the carboxylic acid ester without reaction with the sulfonyl fluoride group but can be further converted to Sulfonate.The perfluoroalkoxy anion -O (CF 2) 2 O (CF 2) 2 SO 2 F formed by 9 and F ~ - interacted with the active alkyl halide and the 5-halo-3-oxa-perfluoro The effect of pentylsulfonyl fluoride and aluminum trichloride on the Friedel-Crafts acylation of aromatic hydrocarbons in the presence of anhydrous aluminum trichloride, with carbon tetrachloride as a solvent and changing the loading sequence, increases ketone production rate.