METHOD FOR PRODUCING DIFLUOROMETHYLENE COMPOUND Russian patent published in 2021 - IPC C07C67/30 C07C69/62 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for producing a difluoromethylene compound represented by the formula (1): R¹¹-CF₂-R¹² (1), where R¹¹ is R²¹ or fluorine, R¹² is R²², R²¹ and R²² are the same or different, and each is (a) hydrogen or (b) an organic group, which is linear or branched C₁-C₁₀ alkyl; RCO- or ROCO-, where R is linear or branched C₁-C₁₀ alkyl; C₆-C₁₈ aryl optionally containing at least a substituent; or R²¹ and R²², together with a -CF₂- fragment, to which they are attached, can form C₃-C₈ cycloalkane, provided that (i) neither R¹¹, nor R¹² is hydroxyl, wherein the method includes a stage A of mixing: a) a carbonyl compound containing a -C(O)- fragment represented by the formula (2): R²¹-C(O)-R²² (2), where symbols R²¹ and R²² in the formula are the same as defined above; b) optionally heterocyclic amine; c) hydrogen fluoride; d) a halogenated fluorine compound represented by the formula: XF_n, where X is chlorine, bromine or iodine, and n is a natural number from 1 to 5; and e) sulfur chloride.

EFFECT: new method for producing a difluoromethylene compound is obtained.

9 cl, 6 ex