发明公开
EP0957090A1 Method for producing 3,3,4,4-tetramethyl-2-azetidinone
审中-公开
Verfahren zur Herstellung von 3,3,4,4-四甲基-2-氮杂环丁酮
- 专利标题: Method for producing 3,3,4,4-tetramethyl-2-azetidinone
- 专利标题(中): Verfahren zur Herstellung von 3,3,4,4-四甲基-2-氮杂环丁酮
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申请号: EP99303723.3申请日: 1999-05-12
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公开(公告)号: EP0957090A1公开(公告)日: 1999-11-17
- 发明人: Haga, Toru , Imi, Katsuharu , Ogawa, Takeshi
- 申请人: Sumitomo Chemical Company, Limited
- 申请人地址: 5-33, Kitahama 4-chome Chuo-ku Osaka 541-8550 JP
- 专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人地址: 5-33, Kitahama 4-chome Chuo-ku Osaka 541-8550 JP
- 代理机构: Cresswell, Thomas Anthony
- 优先权: JP13036798 19980513
- 主分类号: C07D205/08
- IPC分类号: C07D205/08
摘要:
The present invention provides a method for producing 3,3,4,4-tetramethyl-2-azetidinone comprising removing a chlorosulfonyl group from 1-chlorosulfonyl-3,3,4,4-tetramethyl-2-azetidinone using an alkali compound in the presence of a phase transfer catalyst, which has excellent operability and high yield and provides easy treatment of the waste liquid.
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