第 42 卷第 5 期Vol. 42 No. 5
2012 年 10 月Oct 2012

所属栏目:农药及中间体

3,3-二甲基-4-戊烯酸甲酯合成方法的改进及表征
廖艳芳,余慧群,莫友彬,周 海,彭初和 (广西化工研究院,广西 南宁 530001)
摘 要:采用相模法以原乙酸三甲酯与3-甲基-2-丁烯醇为原料,经过重排反应和酯交换反应,合成了除虫菊酯类杀虫剂的重要中间体3,3-二甲基-4-戊烯酸甲酯。改进相模的工艺更适应工业生产,收率达到85.6%,产品纯度达到99.2%。
关键词:3,3-二甲基-4-戊烯酸甲酯;3-甲基-2-丁烯醇;原乙酸三甲酯;合成
中图分类号:TQ453.6  文献标识码:A  文章编号:1009-9212(2012)05-0014-03
Improved Synthesis of 3,3-Dimethyl-4-pentenoic Acid Methyl Ester
LIAO Yan-fang ,YU Hui-qun,MO You-bin,ZHOU Hai,PENG Chu-he (Guangxi Research Institute of Chemical Industry,Nanning 530001,China)
Abstract:3,3-Dimethyl-4-pentenoic acid methyl ester is an important intermediate for the synthesis of pyrethroids pesticides. It can be prepared using 3-methyl-2-buten-1-ol and trimethyl orthoacetate as the starting materials,through Claisen rearrangement and transesterification reaction(Sagami method). This method was improved for industrial production and the product was obtained in 85.5% yield with purity of 99.2%.
Key words:3,3-dimethyl-4-pentenoic acid methyl ester;3-methyl-2-buten-1-ol;trimethyl orthoacetate;synthesis
基金项目:广西自然科学基金重点项目(2010GXNSFD013020)。
作者简介:廖艳芳(1980-),女,广西桂林人,工程师,硕士,研究方向:有机合成及色谱分析。(E-mail:ff8015@163.com)
收稿日期:2012-10-05