申请人:TAMA KAGAKU KOGYO CO., LTD
公开号:US20150218105A1
公开(公告)日:2015-08-06
The present invention is a method for producing a 1-substituted-3-fluoroalkylpyrazole-4-caroxylic acid ester, the method comprising a step of adding, to a first reaction liquid containing an alkyl hydrazine and a first organic solvent, a second reaction liquid containing an acyl acetic acid ester derivative and a second organic solvent in 0.5 to 30 hours to react the first reaction liquid with the second reaction liquid at a reaction temperature of −5 to 80° C. under stirring in the absence of a base and an acid, wherein the first organic solvent and the second organic solvent are each at least any one of benzene, toluene, xylene, chlorobenzene, dichlorobenzene, ethyl acetate, butyl acetate, and dimethyl carbonate, a total mass of the first organic solvent and the second organic solvent is 1 to 60 times a mass of the acyl acetic acid ester derivative, and an amount of the first organic solvent in a total amount of the first organic solvent and the second organic solvent is 40 to 95% by mass.
本发明是一种生产1-取代-3-氟烷基吡唑-4-羧酸酯的方法,该方法包括向含有烷基肼和第一有机溶剂的第一反应液中加入含有酰乙酸酯衍生物和第二有机溶剂的第二反应液,反应时间为0.5至30小时,在-5至80°C的反应温度下,在无碱和酸的情况下搅拌反应第一反应液和第二反应液,其中第一有机溶剂和第二有机溶剂至少为苯、甲苯、二甲苯、氯苯、二氯苯、乙酸乙酯、丁酸乙酯和碳酸二甲酯中的任意一种,第一有机溶剂和第二有机溶剂的总质量为酰乙酸酯衍生物质量的1至60倍,第一有机溶剂在第一有机溶剂和第二有机溶剂的总量中所占的质量百分比为40至95%。