发明授权
- 专利标题: Process for the preparation of benzothioxanthene dyestuffs
- 专利标题(中): 制备苯并噻吩染料的方法
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申请号: US805897申请日: 1991-12-12
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公开(公告)号: US5280128A公开(公告)日: 1994-01-18
- 发明人: Wolfgang Bauer , Eberhard Grimm , Uwe Nickel , Manfred Schrod , Herbert Wille
- 申请人: Wolfgang Bauer , Eberhard Grimm , Uwe Nickel , Manfred Schrod , Herbert Wille
- 申请人地址: DEX Frankfurt
- 专利权人: Cassella Aktiengesellschaft
- 当前专利权人: Cassella Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt
- 优先权: DEX4041853 19901224
- 主分类号: C09B5/00
- IPC分类号: C09B5/00 ; C09B5/24 ; C09B57/14 ; C07D335/04 ; C07D335/10
摘要:
The present invention relates to a process for the preparation of benzothioxanthene dyestuffs and cyclisation of 3-(2'-aminophenylthio)-benzanathrones wherein the diazotisation and cyclisation are carried out simultaneously in polar, aprotic solvent in the presence of water.
公开/授权文献
- USD298947S Support manifold for a glue dispenser 公开/授权日:1988-12-13