发明授权
US07772436B2 Process for producing 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl 有权
制备2,2'-双(三氟甲基)-4,4'-二氨基联苯的方法

  • 专利标题: Process for producing 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl
  • 专利标题(中): 制备2,2'-双(三氟甲基)-4,4'-二氨基联苯的方法
  • 申请号: US11666548
    申请日: 2004-11-05
  • 公开(公告)号: US07772436B2
    公开(公告)日: 2010-08-10
  • 发明人: Takeshi NamekataTetsuo Murata
  • 申请人: Takeshi NamekataTetsuo Murata
  • 申请人地址: JP Sapporo-Shi, Hokkaido
  • 专利权人: Air Water Inc.
  • 当前专利权人: Air Water Inc.
  • 当前专利权人地址: JP Sapporo-Shi, Hokkaido
  • 代理机构: Buchanan Ingersoll & Rooney PC
  • 国际申请: PCT/JP2004/016403 WO 20041105
  • 国际公布: WO2006/048935 WO 20060511
  • 主分类号: C07C211/00
  • IPC分类号: C07C211/00
Process for producing 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl
摘要:
A process for producing 2,2′-bis (trifluoromethyl)-4,4′-diaminobiphenyl which is useful as a raw material for polyimide resin, etc.In benzidine rearrangement of 3,3′-bis(trifluoromethyl) hydrazobenzene in the presence of an inorganic acid such as sulfuric acid aqueous solution or concentrated hydrochloric acid, use of a water-immiscible organic solvent such as toluene as reaction solvent can increase the yield of the product.3,3′-bis(trifluoromethyl) hydrazobenzene can be synthesized by reduction of m-nitrobenzotrifluoride.
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