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本文研究了取代基对亚磺化脱碘反应的影响.带极性取代基的碘代全氟烷I(CF_2)_nO(CF_2)_2-SO_3Na(1a～1c,n=2,4,6)、I(CF_2)_nOCF_2CO_2Na(2a～2b,n=2,4)、I(CF_2)_2O(CF_2)_2SO_2K(3)及I(CF_2)_4OCF_2CONH_2(4)于水溶液中在温和的条件下可与连二亚硫酸钠进行亚磺化脱碘反应,生成相应取代的全氟烷基亚磺酸盐NaO_2S(CF_2)_nO(CF_2)_2SO_3Na(5a～5c,n=2,4,6)、NaO_2S(CF_2)_n-OCF_2CO_2Na(6a～6b,n=2,4)、NaO_28(CF_2)_2O(CF_2)_2SO_2K(7)及NaO_2S(CF_2)_4OCF_2CONH_2(8).这些亚磺酸盐均可按常规方法转化成相应取代的磺酰氯,从而提供了合成带这些取代基的全氟烷基亚磺酸盐及磺酸等衍生物的方便途径.
In this paper, the effects of substituents on the sulfonation of iodine were studied. The iodinated perfluoroalkanes I (CF_2) _nO (CF_2) _2-SO_3Na with polar substituents (1a ~ 1c, n = 2,4,6) , I (CF_2) _nOCF_2CO_2Na (2a ~ 2b, n = 2,4), I (CF_2) __2O (CF_2) _2SO_2K (3) and I (CF_2) _4OCF_2CONH_2 (4) in aqueous solution under mild conditions Sulfidation and iodination reactions of sodium dithionite led to the formation of the corresponding substituted perfluoroalkanesulfinates Naa_2S (CF_2) _nO (CF_2) _2SO_3Na (5a ~ 5c, n = 2,4,6), NaO_2S (CF_2) _n -OCF_2CO_2Na (6a ~ 6b, n = 2,4), NaO_28 (CF_2) __2O (CF_2) _2SO_2K (7) and NaO_2S (CF_2) _4OCF_2CONH_2 (8) .These sulfonates can be converted to the corresponding substituted Of sulfonyl chlorides, thus providing a convenient way to synthesize perfluoroalkyl sulfinates and derivatives of these acids with these substituents.