19190-57-9Relevant articles and documents
PROCESS FOR PRODUCING FLUORINATED COMPOUND
-
Paragraph 0252, (2016/06/28)
To provide a process for producing a desired perfluorinated product at a high yield in a fluorination reaction of a partially fluorinated ester. A perfluorinated compound (4) is obtained by fluorinating in a liquid phase a compound (3) (wherein the fluorine content is at least 30 mass %) obtained by reacting a compound (1) and a compound (2), wherein the compound (1) is HOCH2—RA—CH2OH, the compound (2) is X1C(═O)—C(RB)(RC)(RD), RA is a bivalent saturated hydrocarbon group or the like which has no hetero atom such as an etheric oxygen atom, X1 is a halogen atom, and —C(RB)(RC)(RD) is a branched group.
Synthesis of perfluorinated carboxylic acid membrane monomers by utilizing liquid-phase direct fluorination
Okazoe, Takashi,Watanabe, Kunio,Itoh, Masahiro,Shirakawa, Daisuke,Kawahara, Kengo,Tatematsu, Shin
, p. 521 - 527 (2007/10/03)
A new synthetic procedure for the preparation of perfluorinated carboxylic acid membrane monomers from non-fluorinated compounds has been developed. A key step in the synthetic route is liquid-phase direct fluorination reaction with elemental fluorine. Direct fluorination of a partially fluorinated diester, which was prepared from a hydrocarbon diol and a perfluorinated acyl fluoride, followed by thermal elimination, gave a perfluorinated diacyl fluoride, which is a precursor of a perfluorinated carboxylic acid membrane monomer.
Process for producing polyfluorodiacyl fluoride
-
, (2008/06/13)
Polyfluorodiacyl fluorides having the formula wherein n represents an integer of 2 to 4; X represents fluorine or chlorine atom or trifluoromethyl group; p=0 to 5; q=0 to 5; p+q>1 are produced by reacting a perfluorolactone with a fluorocarbon epoxide, optionally in the presence of an aprotic polar solvent and a nucleophilic reagent.
