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2,6-二氯-3-硝基吡啶
请问2,6-二氯-3-硝基吡啶有一些什么用处！希望您能帮我解决这个问题！我找了很多资料一直都没有找到这方面的！谢谢您 了！您可以给我邮件解答！谢谢！
咨询者：谢东峰 咨询时间：2006-05-27 状态：已回复
专家 张元发 解答表达感谢 继续咨询该问题 参与讨论-
2,6-dichloro-3-nitropyridine has useful herbicidal properties. Furthermore, this compound is useful as a chemical intermediate for dyes, pharmaceutical and other agricultural applications.
It is known that 2,6-dichloropyridine could be nitrated with a mixture of HNO.sub.3 and H.sub.2 SO.sub.4 to give 2,6-dichloro-3-nitropyridine. See Johnson et al, J. Chem. Soc. (B), 1967, pp. 1204-1210 and U.S. Pat. No. 3,809,695, issued to Steinmetz et al on May 7, 1974. However, the nitration reactions disclosed by these prior art references employed relatively high molar ratios of HNO.sub.3 to 2,6-dichloropyridines (i.e., both were over 10:1) to effect the nitration. Also, these inventions were accompanied by the evolution of hazardous brown nitrogen oxides from the reaction mixture. On large commercial scale operations, the employment of this relatively high molar ratio and evolution of hazardous fumes are both undesirable because of the low productivity associated with the high levels of HNO.sub.3 needed and possible environment problems, respectively.
Accordingly, it would be beneficial if the conditions of this nitration reaction could be improved so that lower molar ratios of HNO.sub.3 to 2,6-dichloropyridine could be employed and little or no evolution of nitrogen oxides occurred during the reaction.
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回复：张元发 回复时间：2006-06-02
留言 07-02-11 00:20 发布者:谢东峰注意：以上网友留言只代表网友个人观点，不代表本网观点。
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