METHOD OF SYNTHESIS OF FLUOROPERHALOGENALKYLTHIOESTERS Russian patent published in 1995 - IPC

FIELD: organic chemistry. SUBSTANCE: product: fluoroperhalogenalkylthioesters of the formula R′-S-CFYT where R′ phenyl radical, alkyl radical or benzyl, radical of the formula (CH₂)_nC(O)O(C₁-C₆)-alkyl where n 1-6, or radical of the formula (I) where R″ - Hal or CF, Hal-atom F, Cl or Br; Y and T are independently each of other represents F, Cl or Br or perhalogenalkyl chain containing 1-11 carbon atoms. The yield is up to 95% Reagent 1: alkylhalogenide of the formula XCFYT where Y and T as indicated above; X Cl, Br or J at condition: if X Cl then Y can not be neither F nor perhalogenalkyl chain contaning 1-11 carbon atoms; if X Br then at least one of Y and T is F, and if X Y then Y-perhalogenalkyl chain and T is F atom. Reagent 2: R′-S-S-R′-disulfide where R′ as indicated above. Reaction conditions: in the presence of reductant such as combination of zinc with sulfur dioxide, alkaline metal dithionite, alkaline metal or zinc hydroxymethanesulfinite, or combination of formate anion with sulfur dioxide, in the medium of aprotonic polar solvent such as dimethylformamide. EFFECT: simplified method of synthesis. 8 cl