The present invention relates to a method for producing a compound of the formula [7]
1
wherein R
1
is an optionally substituted cycloalkyl group, an optionally substituted aryl group or an optionally substituted heterocyclic group, R
2
is a lower alkyl or a halogenated lower alkyl and R
3
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.
2
本发明涉及一种生产式[7&rsqb化合物的方法;
1
其中 R
1
是任选取代的
环烷基、任选取代的芳基或任选取代的杂环基,R
2
是低级烷基或卤代低级烷基,R
3
是卤素原子或
氢原子。本发明的方法包括将化合物[1]与亚
硫酰氯反应,得到化合物[2],并通过
中间体[5]以高收率得到目的化合物[7],并可用于工业生产。
2