发明授权
US4393206A Process for the production of 2,3-Dihydro-4H-1,4-benzothiazines
失效
2,3-二氢-4H-1,4-苯并噻嗪的制备方法
- 专利标题: Process for the production of 2,3-Dihydro-4H-1,4-benzothiazines
- 专利标题(中): 2,3-二氢-4H-1,4-苯并噻嗪的制备方法
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申请号: US359221申请日: 1982-03-18
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公开(公告)号: US4393206A公开(公告)日: 1983-07-12
- 发明人: Paul Uhrhan , Edmund Krauthausen
- 申请人: Paul Uhrhan , Edmund Krauthausen
- 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: DEX3111487 19810324
- 主分类号: C08K5/00
- IPC分类号: C08K5/00 ; C07D279/16 ; C07D279/20 ; C08K5/36 ; C08K5/372 ; C08L7/00 ; C08L21/00
摘要:
Process for the preparation of 2,3-Dihydro-4H-1,4-benzothiazines by cyclisation of suitable 2-(2-Hydroxyalkyl)-thioanilines under elimination of water in the presence of phosphorous acid.
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