A method for producing a 3-halo-1,2-benzisothiazole represented by the general formula (2):
wherein R1 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxycarbonyl group having 2 to 5 carbon atoms, a nitro group or a halogen atom, and X is a halogen atom, the method characterized by reacting a 1,2-benzisothiazol-3-one represented by the general formula (1):
wherein R1 is the same group as the R1 defined in the above general formula (2), with a thionyl halide in a polar solvent. The 3-halo-1,2-benzisothiazole obtainable according to the method of the present invention is suitably used as production raw materials and the like for a medicament and the like.
一种生产一种由通式(2)表示的3-卤代-1,2-苯并
异噻唑的方法:
其中R1是氢原子,具有1至4个碳原子的烷基,具有1至4个碳原子的烷氧基,具有2至5个碳原子的烷氧羰基,硝基或卤原子,X是卤原子,其特征在于将由通式(1)表示的
1,2-苯并异噻唑-3-酮:
其中R1是与上述通式(2)中定义的R1相同的基团,与
硫酰卤在极性溶剂中反应。根据本发明方法获得的3-卤代-1,2-苯并
异噻唑适用于作为药物等的生产原料等。