发明授权
- 专利标题： Preparation of symmetrical tetrachloropyridine
- 专利标题（中）： 对称四氯吡啶的制备
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申请号： US255602申请日： 1981-04-20
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公开(公告)号： US4322538A公开(公告)日： 1982-03-30
- 发明人: Gail E. Vrieland , Bart J. Bremmer , Richard E. Crooks
- 申请人： Gail E. Vrieland , Bart J. Bremmer , Richard E. Crooks
- 申请人地址： MI Midland
- 专利权人： The Dow Chemical Company
- 当前专利权人： The Dow Chemical Company
- 当前专利权人地址： MI Midland
- 主分类号： C07D213/61
- IPC分类号： C07D213/61 ; C07D213/02
摘要：
Symmetrical tetrachloropyridine (2,3,5,6-tetrachloropyridine) is prepared by reacting pentachloropyridine with a source of iodide ions in the presence of a proton source and a solvent medium. The reaction is preferably carried out in a polar, aprotic solvent medium and heated at a temperature of from about 100.degree. C. to about 200.degree. C.
公开/授权文献
- US5507751A Locally flexible dilator sheath 公开/授权日：1996-04-16
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