Asymmetrical bisbenzotriazoles substituted by a perfluoroalkyl moiety
    7.
    发明授权
    Asymmetrical bisbenzotriazoles substituted by a perfluoroalkyl moiety 有权
    被全氟烷基部分取代的不对称双苯并三唑

    公开(公告)号:US06245915B1

    公开(公告)日:2001-06-12

    申请号:US09550724

    申请日:2000-04-17

    IPC分类号: C07D24920

    摘要: Asymmetrical bis benzotriazoles of the formula I where G2′ is perfluoroalkyl of 1 to 12 carbon atoms, preferably CF3, and where G2 does not contain said group are red-shifted and due to the asymmetry are particularly soluble and useful in a host of applications including automotive coatings, thermoplastics and especially in adhesive compositions, themselves useful in solar panels and other laminate structures.

    摘要翻译: 式I的不对称双苯并三唑,其中G2'是1至12个碳原子的全氟烷基,优选CF 3,并且其中不含有所述基团的G2是红移的,并且由于不对称性是特别可溶的并且在许多应用中是有用的,包括汽车 涂料,热塑性塑料,特别是粘合剂组合物,本身可用于太阳能电池板和其他层压结构。

    Processes for the preparation of benzotriazole UV absorbers
    10.
    发明授权
    Processes for the preparation of benzotriazole UV absorbers 失效
    制备苯并三唑紫外线吸收剂的方法

    公开(公告)号:US06815550B2

    公开(公告)日:2004-11-09

    申请号:US10315693

    申请日:2002-12-10

    IPC分类号: C07D24920

    CPC分类号: C07D249/20 C07C245/08

    摘要: Provided is a process for preparing 2H-benzotriazole UV absorbers containing a perfluoroalkyl moiety at the 5-position of the benzoic ring, for example a trifluoromethyl group, which involves digitizing the perfluoroalkyl substituted o-nitroaniline using concentrated sulfuric acid plus sodium nitrite or nitrosylsulfuric acid to form the corresponding monoazobenzene intermediate via the diazonium salt intermediate which is reduced to the corresponding 5-perfluoroalkyl substituted 2H-benzotriazole UV absorber compound by conventional reduction means. Also provided is a novel one-pot, multiphase reaction for the preparation of 2(2-nitrophenylazo) substituted phenols, which are precursors for 2H-benzotriazole UV absorbers.

    摘要翻译: 提供了制备在苯甲酸环的5位上含有全氟烷基部分的2H-苯并三唑UV吸收剂的方法,例如三氟甲基,其涉及使用浓硫酸加亚硝酸钠或亚硝酰基硫酸将全氟烷基取代的邻硝基苯胺数字化 通过重氮盐中间体形成相应的单偶氮苯中间体,其通过常规还原方法还原成相应的5-全氟烷基取代的2H-苯并三唑UV吸收剂化合物。 还提供了用于制备2(2-硝基苯基偶氮)取代的酚的新颖的一锅多相反应,其是2H-苯并三唑UV吸收剂的前体。