发明授权
- 专利标题: Process for the preparation of 1,2-benzisothiazolin-3-ones
- 专利标题(中): 1,2-苯并异噻唑啉-3-酮的制备方法
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申请号: US875075申请日: 1997-07-17
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公开(公告)号: US5936094A公开(公告)日: 1999-08-10
- 发明人: Mark Robert James
- 申请人: Mark Robert James
- 申请人地址: GBX London
- 专利权人: Zeneca Limited
- 当前专利权人: Zeneca Limited
- 当前专利权人地址: GBX London
- 优先权: GBX9505377 19950317
- 主分类号: C07D275/04
- IPC分类号: C07D275/04 ; C07D275/06
摘要:
A process for making a 2-alkylbenzisothiazolinone which comprises reacting a bisamide of formula ##STR1## in water or an organic liquid containing water with a bisulphite or bisulphite release agent to form a Bunte salt and converting the Bunte salt under alkaline conditions to 2-alkyl-BIT. R is alkyl. Preferred substituents R are butyl, hexyl, 2-ethylbutyl and 2-ethylhexyl.
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