The simple and effective syntheses of CH2FCH2S03H, CF3CH2S03H, and CHF2CF2CH2S03H have been achieved with 18.8%, 34.1%, and 33.7% overall yields. The low molecular weight partially fluorinated alkanesulfonic acids containing -methylene groups can be prepared from the p-toluenesulfonates of the corresponding alcohols, via a reaction with benzyl mercaptan, followed by an oxidative chlorination of the resulting sulfides, with subsequent hydrolysis of the sulfonyl chloride formed: R,CH2OH
Aus 2,2,2‐Trifluorethanol (Ia) wird über die Sulfonsäureester (Ib) oder (Ic) das Thiocyanat (II) hergestellt und weiter zur Sulfonsäure (III) oxidiert.
Die Sulfonsäuren (IV) werden aus den entsprechenden Alkoholen über die Tosylate (und eventuell Bromide) (I), die Sulfide (II) und die Sulfonylchloride (III) dargestellt.
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