To provide a method for purification by which a high-purity objective substance can efficiently be obtained from a fluoro-β-dicarbonyl compound containing a by-product such as a difluoro derivative without emitting an acidic gas, or the like, by decomposition.
This method for purifying a fluoro-β-dicarbonyl compound is characterized as follows. A mixture containing the fluoro-β-dicarbonyl compound represented by the formula (1) R1COC R2FCOR3 (wherein, R1 is hydrogen atom, a substituted or an unsubstituted alkyl group or a substituted or an unsubstituted aryl group; R2 is hydrogen atom, a halogen atom, a substituted or an unsubstituted alkyl group or a substituted or an unsubstituted aryl group; R3 is hydrogen atom, a substituted or an unsubstituted alkyl group, a substituted or an unsubstituted aryl group, a substituted or an unsubstituted alkoxy group or a substituted or an unsubstituted aryloxy group; or at least two of R1, R2 and R3 together may form a part of a cyclic structure with or without interposition of a heteroatom) and a polyfluoro compound in which hydrogen atoms bound to the carbon atom of the fluoro-β-dicarbonyl compound are further substituted with ≥1 fluorine atoms is brought into contact with an acid-receiving agent.
OTSUKA TATSUYA
Kakehi Yuro
Takeshi Ohara
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano
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