Process for the preparation of UV filter substances
    2.
    发明授权
    Process for the preparation of UV filter substances 失效
    UV过滤物质的制备工艺

    公开(公告)号:US06593476B2

    公开(公告)日:2003-07-15

    申请号:US09887265

    申请日:2001-06-25

    IPC分类号: C07D23518

    摘要: The present invention relates to a preparation process for 2-arylbenzimidazolesulfonic acids of the formula I: Ar is a substituted or unsubstituted phenyl or naphthyl radical and R is a C1-8-alkyl or C1-8-alkoxy radical. n is 1-4, m is 1-3 and o is 0-2. o-phenylenediamine is reacted in the presence of oleum with an arylcarboxylic acid or an arylcarboxylic acid derivative. Compounds prepared in this way can be used as UV filters, and as components in cosmetic compositions.

    摘要翻译: 本发明涉及式I的2-芳基苯并咪唑磺酸的制备方法:Ar是取代或未取代的苯基或萘基,R是C 1-8 - 烷基或C 1-8 - 烷氧基。 n为1-4,m为1-3,o为0-2。 邻苯二胺在发烟硫酸与芳基羧酸或芳基羧酸衍生物的存在下反应。 以这种方式制备的化合物可用作UV过滤器,并且可用作化妆品组合物中的组分。