The present invention relates to a method for producing a compound of the formula [7]
wherein R1 is an optionally substituted cycloalkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group, R2 is a lower alkyl or a halogenated lower alkyl and R3 is a halogen atom or a hydrogen atom. The method of the present invention includes reacting compound [1] with thionyl chloride to give compound [2] and obtaining the objective compound [7] at a high yield via intermediate [5], and is utilizable for industrial production.
本发明涉及一种制备式(7)化合物的方法,其中R1是可选取的取代环烷基、可选取的取代芳基或可选取的取代杂环基,R2是低碳基或卤代低碳基,R3是卤素原子或氢原子。本发明的方法包括将化合物(1)与
氯化硫酰反应得到化合物(2),通过中间体(5)高产率地得到目标化合物(7),可用于工业生产。