Process for preparing fluoroperhaloalkyl isocyanates
    2.
    发明授权
    Process for preparing fluoroperhaloalkyl isocyanates 失效
    制备氟代烷基异氰酸酯的方法

    公开(公告)号:US3705917A

    公开(公告)日:1972-12-12

    申请号:US3705917D

    申请日:1970-02-26

    Applicant: ALLIED CHEM

    Abstract: FLUOROPERHALOALKYL ISOCYANATES AND FLUOROPERHALOAZAOLEFINS ARE PREPARED BY REACTING A FLUOROPERHALOGENATED CARBONYL COMPOUND WITH A CYANOGEN HALIDE AND AN IONIZABLE FLUORIDE SALT IN THE PRESENCE OF AN APROTIC, POLAR LIQUID REACTION MEDIUM. FOR EXAMPLE, (CF3)2CFNO AND

    (CF3>2CFN=C(CF3)2

    ARE PREPARED BY REACTING HEXAFLUOROACETONE WITH CYANOGEN CHLORIDE AND POTASSIUM FLUORIDE IN THE PRESENCE OF ACETONITRILE. A SEPARATE MIXTURE OF THE ISOCYANATE AND THE AZAOLEFIN IS NORMALLY OBTAINED, BUT THE REACTION CONDITIONS CAN BE CONTROLLED TO FAVOR FORMATION OF EITHER PRODUCT.

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