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    Red-shifted tris-aryl-S-triazines
    1.
    发明授权
    Red-shifted tris-aryl-S-triazines 失效
    红移三芳基-S-三嗪

    公开(公告)号：US5675004A

    公开(公告)日：1997-10-07

    申请号：US463569

    申请日：1995-06-02

    Applicant: Tyler Arthur Stevenson

    Inventor： Tyler Arthur Stevenson

    IPC: C07D251/12 ,  A61K31/53 ,  C07D251/24 ,  C07D401/12 ,  C07D405/12 ,  C07F9/6558 ,  C08K5/3492 ,  C09D5/00 ,  C09D5/32 ,  C09D201/00 ,  C09K3/00

    CPC classification number: C07D251/24 ,  C08K5/3492

    Abstract: Tris-aryl-s-triazines of formula V ##STR1## which contain from one one to three resorcinol derived moieties with at least one of said moieties substituted in the 5-position with a group such as, for example, alkyl or phenylalkyl have UV spectra which are red-shifted to the near UV range and provide excellent stabilization to polymeric substrates against the deleterious effects of actinic light.

    Abstract translation: 式V的三芳基-s-三嗪含有一个至三个间苯二酚衍生部分，其中至少一个所述部分在5-位被一个基团例如烷基或苯基烷基取代， 紫外光谱被红色偏移到近紫外范围，并且提供对聚合物底物的极好的稳定性，以抵抗光化光的有害影响。

    Methods for the preparation of tris-aryl-o-hydroxyphenyl-s-triazines
    3.
    发明授权
    Methods for the preparation of tris-aryl-o-hydroxyphenyl-s-triazines 有权
    三芳基邻羟基苯基-s-三嗪的制备方法

    公开(公告)号：US06242598B1

    公开(公告)日：2001-06-05

    申请号：US09532222

    申请日：2000-03-22

    Applicant: Tyler Arthur Stevenson ,  Michael Ackerman ,  Pascal Hayoz ,  Roger Meuwly ,  John Francis Oswald ,  Christian Schregenberger

    Inventor： Tyler Arthur Stevenson ,  Michael Ackerman ,  Pascal Hayoz ,  Roger Meuwly ,  John Francis Oswald ,  Christian Schregenberger

    IPC: C07D25122

    CPC classification number: C07D251/24

    Abstract: A process for preparing 2-(2,4-dihydroxyphenyl)-4.6-diaryl-s-triazines in three steps starting with cyanuric chloride is described. Step 1 involves the nucleophilic (basic) displacement of one chlorine atom with a phenolic moiety. Step 2 involves a Friedel-Crafts reaction using a Lewis acid catalyst (preferably aluminum chloride) to replace the remaining two chlorine atoms with aryl groups such as xylyl. Finally, step 3 involves replacing the phenolic moiety with resorcinol using either a Lewis acid or protic acid catalyst or combinations thereof. Some additional processes only peripherally related to the three-step process outlined above are also described for the preparation of various s-triazine compounds. The s-triazines prepared are useful as UV absorbers for the stabilization of organic substrates against the adverse effects of actinic light.

    Abstract translation: 描述了从氰尿酰氯开始三步制备2-（2,4-二羟基苯基）-4,6-二芳基-s-三嗪的方法。 步骤1涉及一个氯原子与酚部分的亲核（碱性）置换。 步骤2涉及使用路易斯酸催化剂（优选氯化铝）的Friedel-Crafts反应以用诸如二甲苯基之类的芳基取代剩余的两个氯原子。 最后，步骤3涉及使用路易斯酸或质子酸催化剂或其组合将间苯二酚替代酚部分。 还描述了与上述三步法相关的一些附加方法，用于制备各种s-三嗪化合物。 制备的s-三嗪可用作稳定有机基材以防止光化性光的不利影响的紫外线吸收剂。

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