| Original document(24 pages) 中文版 |
A method for preparing 2,3-dichloropyridine is disclosed in which 3-amino-2-chloropyridine is contacted with an alkali metal nitrite in the presence of aqueous hydrochloric acid to form a diazonium salt; and the diazonium salt is subsequently decomposed in the presence of copper catalyst wherein at least about 50% of the copper is the copper(II) oxidation state. |
Application Number
申请号 |
200580002691 |
Application Date
申请日 |
2005.01.21 |
| Title 名称 |
Process for the manufacture of 2,3-dichloropyridine |
Publication Number
公开号 |
1910152 |
Publication Date
公开日 |
2007.02.07 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
C07D213/61;C07D213/73;C07D213/82 |
Applicant(s) Name
申请人 |
Du Pont |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Shapiro Rafael |
| Attorney & Agent 代理人 |
yu hui |
| More information 更 多 信 息 |
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