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全氟碘代烷及溴代烷与连二亚硫酸钠反应可生成对应的亚磺酸钠,但全氟氯代烷(R_FCl)在相同条件下不能发生类似的反应.本文报道某些RCCl_3型化合物在相当温和的条件下发生脱氯亚磺化反应,得到α,α-二氯多氟烷基亚磺酸盐(RCCl_2SO_2Na)的研究结果. 在水和乙腈的共溶剂反应体系中,四氯化碳(1a)和氟氯烷1b～1f均可在25℃下与连二亚硫酸钠-碳酸氢钠反应,生成相应的亚磺酸钠盐2a～2f,产率可达80％以上.这些亚磺酸盐与氯气反应均可转化为对应的磺酰氯3a～3f,产率75～90％.
Perfluoroalkyl iodides and alkyl bromides react with sodium dithionite to form the corresponding sodium sulfites, but perfluorochloroalkanes (R_FCl) can not react under the same conditions.It is reported that some RCCl_3 compounds in the Under mild conditions dechlorination and sulfonation reaction, α, α-dichloro-polyfluoroalkylsulfinate (RCCl_2SO_2Na) results in the water and acetonitrile co-solvent reaction system, carbon tetrachloride (1a) and chlorofluorocarbons 1b ~ 1f can react with sodium dithionite - sodium bicarbonate at 25 ℃ to produce the corresponding sulfonic acid sodium salt 2a ~ 2f with the yield of over 80% Salt and chlorine reaction can be converted to the corresponding sulfonyl chloride 3a ~ 3f, the yield of 75 to 90%.