| 发明名称 |
Process for the preparation of 2,6-diaminopyridine-azo dyestuffs and of their precursors |
| 摘要 |
An improved process for producing 2,6-diaminopyridines and azo dyestuffs therefrom involves reacting a 2,6-dihalopyridine with a primary amine in a two-phase system of water and an insoluble or sparingly soluble inert organic solvent in the presence of an inorganic base.
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| 申请公布号 |
US4325870(A) |
申请公布日期 |
1982.04.20 |
| 申请号 |
US19800136814 |
申请日期 |
1980.04.02 |
| 申请人 |
CASSELLA AKTIENGESELLSCHAFT |
发明人 |
BUEHLER, ULRICH;HEINRICH, ERNST |
| 分类号 |
C07D213/77;C07D213/85;C09B29/42;C09B31/153;(IPC1-7):C09B29/42;C07D213/74 |
主分类号 |
C07D213/77 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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