会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • PROCESS FOR PREPARING A 4,7-BIS(5-HALOTHIEN-2-YL)-2,1,3-BENZOTHIADIAZOLE AND A PRECURSOR THEREFOR
    • 制备4,7-双(5-咔唑-2-基)-2,1,3-苯并哒嗪及其前体的方法
    • WO2004103981A1
    • 2004-12-02
    • PCT/US2004/014751
    • 2004-05-12
    • DOW GLOBAL TECHNOLOGIES INC.ZHANG, Chunming
    • ZHANG, Chunming
    • C07D285/14
    • C07D417/14
    • The present invention is directed to a method for preparing a 4,7-bis(5-halothien-2-yl)-2,1,3-benzothiadiazole, more particularly, 4,7-bis(5-bromothien-2-yl)-2,1,3-benzothiadiazole, and a precursor therefor, namely, a 4,7-bis(thien-2-yl)-2,1,3- benzothiadiazole. The precursor is prepared by contacting in the presence of a palladium catalyst and a solvent a 4,7-dihalo-2,1,3-benzothiadiazole with a thienyl group adding reagent, which can either be a 2-thienylzinc halide, a 2-thienylmagnesium halide, or a 2-thiopheneboronic acid, under such conditions as to form 4,7-bis(thien-2-yl)-2,1,3-benzothiadiazole. The precursor can then be halogenated, preferably brominated, to form the desired dibrominated product, which is a particularly suitable monomer for the preparation of a copolymer of a 9,9-disubstituted fluorene. This copolymer is useful, for example, in polymeric light emitting diode (pLED) applications.
    • 本发明涉及一种制备4,7-双(5-卤代噻吩-2-基)-2,1,3-苯并噻二唑,更特别是4,7-双(5-溴噻吩-2-基) )-2,1,3-苯并噻二唑及其前体,即4,7-双(噻吩-2-基)-2,1,3-苯并噻二唑。 通过在钯催化剂和4,7-二卤代-2,1,3-苯并噻二唑的溶剂与噻吩基加成试剂的存在下接触来制备前体,噻吩基加成试剂可以是2-噻吩基卤化物,2- 噻吩基镁卤化物或2-噻吩硼酸,在形成4,7-双(噻吩-2-基)-2,1,3-苯并噻二唑的条件下进行。 然后可以将前体卤化,优选溴化,以形成所需的二溴化产物,其是用于制备9,9-二取代芴共聚物的特别合适的单体。 该共聚物在例如聚合物发光二极管(pLED)应用中是有用的。