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    • 10. 发明公开
    • Process for producing 1,3-bis(dicarboxyphenyl)-disiloxane derivative or dianhydride thereof
    • Verfahren zur产品von 1,3-双(二羧基苯基)二硅氧烷衍生物,deren Dianhydriden。
    • EP0292260A2
    • 1988-11-23
    • EP88304499.2
    • 1988-05-18
    • Hitachi Chemical Co., Ltd.
    • Kikuchi, TohruFujita, ToshiyukiKamijima, KoichiSaito, Takayuki
    • C07F7/08
    • C07F7/0874C07F7/0889
    • A process for producing a compound of formula [V] or a dianhydride thereof
      wherein R and R′ are the same or different and each is methyl or phenyl comprising
          coupling a Grignard reagent of halo-o-xylene with a disubstituted halosilane
      wherein X is halogen,
          hydroxylating the product silane to form a hydroxysilane
          dehydrating-condensing the hydroxysilane to form a 1,3-bisdimethylphenyl-disilane derivative
          oxidizing the 1,3-bis(dimethylphenyl)disilane derivative to yield the intended 1,3-bis(dicarboxyphenyl)­disiloxane derivative. The dianhydride is formed by dehydration ring closure of this product and [VI], mixing the resulting isomeric mixture with an ether solvent, and recovering the formed precipitate to yield a white powder of the intended dianhydride.
    • 制备式[Ⅴ]化合物或其二酐的方法,其中R和R min相同或不同,各自为甲基或苯基,包括将卤代邻二甲苯格氏试剂与二取代卤代硅烷偶联, CHEM>其中X是卤素,羟基化产物硅烷以形成羟基硅烷,使羟基硅烷脱水缩合,形成氧化1,3-双(二甲基苯基)乙硅烷衍生物的1,3-双(二甲基苯基)乙硅烷衍生物,得到预期的1,3 双(二羧基苯基)二硅氧烷衍生物。 通过该产物和[VI]的脱水闭合形成二酐,将得到的异构体混合物与醚溶剂混合,并回收形成的沉淀物,得到所需二酐的白色粉末。