第 37 卷第 1 期 | | Vol. 37 No. 1 | 2007 年 2 月 | Feb 2007 |
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所属栏目:农药及中间体
光气法合成2,3-吡啶羧酸酐 |
杨剑波,庞怀林,黄超群
(湖南化工研究院,湖南 长沙 410007) |
摘 要:2,3-吡啶羧酸酐是新型广谱除草剂灭草烟的重要中间体,文献所介绍的合成方法是以2,3-吡啶二羧酸与乙酸酐反应制得。笔者在文献基础上对合成方法进行了改进,以2,3-吡啶二羧酸与光气反应,降低了成本,简化了操作,得到的产品纯度达94%,收率超过88%,达到文献值。产品结构经元素分析、红外光谱、核磁共振确证。 |
关键词:2,3-吡啶二羧酸;光气;中间体;2,3-吡啶羧酸酐;灭草烟 |
中图分类号:S482.4 文献标识码:A 文章编号:1009-9212(2007)01- 0023 - 02 |
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Synthesis of Pyridine-2,3-dicarboxylic Anhydride by Phosgene |
YANG Jian-bo,PANG Huai-lin,HUANG Chao-qun
(Hunan Research Institute of Chemical Industry,Changsha 410007,China) |
Abstract:Pyridine-2,3-dicarboxylic anhydride,a key intermediate of the herbicide imazapyr,was synthesized from pyridine-2,3-dicarboxylic acid and anhydride according to the methods in the patents. The synthesis method was improved by replacement of anhydride with phosgene in the paper. The purity and yield of the target product achieved 94% and over 88%,conventient operation and cheap veagents. The structure of product was conformed by elementary analysis,IR and 1H NMR. |
Key words:pyridine-2,3-dicarboxylic acid;phosgene;intermediate;pyridine-2,3-dicarboxylic anhydride;imazapyr |
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作者简介:杨剑波(1968-),女,湖南长沙人,副研究员,从事农药及其中间体的合成研究。(E-mail:yjb8010@sina.com)
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收稿日期:2006-12-07
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