FIELD: chemistry.
SUBSTANCE: method involves reducing hexafluoroacetone (HFA) in an aqueous medium, wherein the hexafluoroacetone is used in trihydrate form or 50% aqueous solution, and the reducing agent used is phosphorous acid in the presence of aqueous ammonia solution in molar ratio HFA:H3PO3NH3 (1:1.2-1.3:3), with catalysis by transition metal salts.
EFFECT: invention enables to obtain the end product in a single step using cheap and nontoxic reactants.
2 ex, 1 tbl
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