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    Substituted perfluoro diphenyl ethers
    2.
    发明授权
    Substituted perfluoro diphenyl ethers 失效
    取代的全氟代二苯醚

    公开(公告)号：US3637866A

    公开(公告)日：1972-01-25

    申请号：US3637866D

    申请日：1968-02-13

    Applicant: US AIR FORCE

    Inventor： PASQUALE RALPH J DE ,  TAMBORSKI CHRIST

    IPC: C07C65/21 ,  C07C43/02 ,  C07C65/00 ,  C07C69/76

    CPC classification number: C07C65/21

    Abstract: NOVEL PERFLUORINATED DIPHENYL ETHERS HAVE AT LEAST 8 FLUORINE SUBSTITUENTS AND AT LEAST ONE SELECTED SUBSTITUENT, OTHER THAN FLUORINE, IN THE DIPHENYL ETHER NUCLEUS. PREFERABLY, THE SELECTED SUSTITUENT IS POSITIONED PARA TO THE ETHER LINKAGE. THE SELECTED SUBSTITUENTS, PREFERABLY, ARE H, BR, CL, CF3, CN, COOC2H5, COOH, C6F5, C6F5-O-C6F4, AND C6F4-O-C6HF4. THE PRODUCTS ARE USEFUL AS INTERMEDIATES FOR THE PREPARATION OF MONOMERS FOR THE SYNTHESIS OF THERMALLY STABLE POLYMERS CONTAINING A FLUOROPHENYLETHER STRUCTURE. A NOVEL METHOD FOR MAKING SUCH ETHERS INVOLVES THE REACTION OF AN ALKALI METAL FLUOROPHENOLATE WITH HEXAFLUOROBENZENE OR A DERIVATIVE THEREOF AT A TEMPERATURE OF ABOUT 100-150*C. AND IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYLFORMAMIDE AND DIMETHYLACETAMIDE.

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