Process for the preparation of triflic anhydride
    28.
    发明授权
    Process for the preparation of triflic anhydride 失效
    制备三氟甲磺酸酐的方法

    公开(公告)号:US06469206B2

    公开(公告)日:2002-10-22

    申请号:US09792995

    申请日:2001-02-26

    IPC分类号: C07C30300

    摘要: Disclosed is a process for the preparation of trifluoromethanesulfonic acid anhydride by the steps of (1) forming a mixed anhydride comprising a trifluoromethanesulfonyl acyl residue and a carboxyl residue by contacting trifluoromethanesulfonic acid or a derivative thereof with a carboxyl compound selected from ketene, dialkyl ketenes, carboxylic acids, and derivatives of carboxylic acids and (2) subjecting the mixed anhydride to reactive distillation wherein the mixed anhydride undergoes disproportionation to produce triflic anhydride and a higher boiling carboxylic acid anhydride.

    摘要翻译: 公开了以下步骤制备三氟甲磺酸酐的方法:(1)通过使三氟甲磺酸或其衍生物与选自乙烯酮,二烷基烯酮的羧基化合物接触,形成包含三氟甲磺酰基残基和羧基残基的混合酸酐, 羧酸和羧酸的衍生物,和(2)使混合酸酐进行反应蒸馏,其中混合酸酐经历歧化以产生三氟甲磺酸酐和较高沸点的羧酸酐。