申请人:Sakaue Shigeki
公开号:US20130005983A1
公开(公告)日:2013-01-03
A method for producing a 3-halo-1,2-benzisothiazole represented by the general formula (2):
wherein R
1
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 R
1
is the same group as the R
1
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.
一种制备3-卤代-1,2-苯并异噻唑的方法,其化学式表示为(2):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,硝基或卤素原子,X是卤素原子,该方法的特征在于将一种化学式表示为(1)的1,2-苯并异噻唑-3-酮:其中R1是与上述化学式(2)中定义的R1相同的基团,在极性溶剂中与硫酰卤反应。根据本发明的方法获得的3-卤代-1,2-苯并异噻唑适用于作为药物等的生产原料等。