发明授权
- 专利标题: Preparation of aromatic fluoro-compounds
- 专利标题(中): 芳香族氟化合物的制备
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申请号: US22595申请日: 1979-03-19
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公开(公告)号: US4263458A公开(公告)日: 1981-04-21
- 发明人: Roy D. Bowden , Leslie Burgess , Raymond J. Clark
- 申请人: Roy D. Bowden , Leslie Burgess , Raymond J. Clark
- 申请人地址: GB2 London
- 专利权人: Imperial Chemical Industries Limited
- 当前专利权人: Imperial Chemical Industries Limited
- 当前专利权人地址: GB2 London
- 优先权: GBX34662/78 19780825
- 主分类号: C07C45/27
- IPC分类号: C07C45/27 ; C07C45/28 ; C07C49/813
摘要:
4,4'-difluoro-benzophenone is prepared from 4,4'-diamino-diphenylmethane by diazotization in anhydrous or concentrated aqueous hydrogen fluoride and decomposition of the diazonium fluoride thus produced in the presence of nitrous acid or nitrite as oxidizing agent.
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