详细信息
1-甲基-3-三氟甲基-1H-吡唑-4-甲酰氯的合成
Synthesis of 1-Methyl-3-(trifluoromethyl)-1H-pyrazole-4-carbonyl Chloride
文献类型:期刊文献
中文题名:1-甲基-3-三氟甲基-1H-吡唑-4-甲酰氯的合成
英文题名:Synthesis of 1-Methyl-3-(trifluoromethyl)-1H-pyrazole-4-carbonyl Chloride
作者:陈倩[1];廖道华[1];张曙光[1];牛纪凤[1];汤阿萍[1]
机构:[1]华东理工大学药学院,上海200237
年份:2012
卷号:51
期号:8
起止页码:569
中文期刊名:农药
外文期刊名:Agrochemicals
收录:CSTPCD;;北大核心:【北大核心2011】;
语种:中文
中文关键词:1-甲基-3-三氟甲基-1H-吡唑-4-甲酰氯;吡噻菌胺;杀菌剂;合成
外文关键词:1-methyl-3-(trifluoromethyl)-lH-pyrazole-4-carbonyl chloride; penthiopyrad; fungicide; synthesis
摘要:[目的]旨在优化合成1-甲基-3-三氟甲基-1H-吡唑-4-甲酰氯并寻找一条适用于工业化生产的工艺路线。[方法]以3-二甲胺基丙烯酸乙酯为原料,经三氟乙酰化、环合后生成1-甲基-3-三氟甲基-1H-吡唑-4-甲酸乙酯,再经过水解并酰氯化得到目标产物1-甲基-3-三氟甲基-1H-吡唑-4-甲酰氯。[结果]反应总收率为46.8%,1-甲基-3-三氟甲基-1H-吡唑-4-甲酸含量为96.1%(HPLC),所有中间体及产物经MS或1H NMR等进行表征。[结论]该路线操作简便、收率较高,适用于工业生产。
[Aims] This article aims to optimize a reasonable route of 1-methyl-3-(trifluoromethyl)-lH-pyrazole- 4-carbonyl chloride on industrial scale. [Methods] 1-Methyl-3-(trifluoromethyl)-lH-pyrazole-4-carbonyl chloride was synthesized from ethyl 3-(dimethylamino)arylate via four steps including acylation, cyclization, hydrolysis, chlorination. [Results] The total yield was 46.8%, and the purity of 1-methyl-3-(trifluoromethyl)-1H- pyrazole-4-carboxylic acid was 96. 1%(HPLC). The products and intermediates were determined by 1H NMR or MS and so on. [Conclusions] The yield is improved and the operation process is simple, which is suitable for industrial production.
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