发明授权
US5637737A Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarbaldehydes
失效
制备2,2-二氟苯并[1,3]二氧羰基醛的方法
- 专利标题: Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarbaldehydes
- 专利标题(中): 制备2,2-二氟苯并[1,3]二氧羰基醛的方法
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申请号: US696670申请日: 1996-08-14
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公开(公告)号: US5637737A公开(公告)日: 1997-06-10
- 发明人: Peter Andres , Albrecht Marhold
- 申请人: Peter Andres , Albrecht Marhold
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX19530637.6 19950821
- 主分类号: C07D317/46
- IPC分类号: C07D317/46
摘要:
2,2-Difluorobenzo[1.3]dioxole-carbaldehydes are prepared in a particularly advantageous manner if methylbenzo[1.3]dioxoles are chlorinated, the resulting dichloromethyl-2,2-dichlorobenzo[1.3]dioxole is fluorinated with hydrogen fluoride and the dichloromethyl-2,2-difluorobenzo[1.3]dioxole obtained by this procedure is reacted with a carboxylic acid.
公开/授权文献
- US4583299A Fluidization aid for cohesive materials 公开/授权日:1986-04-22
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