[Problem to be Solved]
To provide an industrially preferred process for producing an isothiazole compound, particularly 3,4-dichloro-5-cyanoisothiazole. For example, to provide a safer industrial production process by avoiding the simultaneous use of an aprotic polar solvent such as N,N-dimethylformamide and chlorine. In addition, to provide a production process which is economically preferred because an aprotic polar solvent, which is highly likely to become a part of waste, is not used.
[Solution]
A process for producing an isothiazole compound represented by a general formula (3), wherein R is a cyano group or the like; and X is a chlorine atom or the like, which comprises heating a nitrile compound represented by a general formula (1), wherein R is as defined above, and sulfur, and then carrying out a reaction between the nitrile compound represented by the general formula (1), the sulfur and a halogen represented by a general formula (2), wherein X is as defined above.
[有待解决的问题]
提供一种生产
异噻唑化合物,特别是 3,4-二
氯-5-
氰基
异噻唑的工业优选工艺。例如,通过避免同时使用
N,N-二甲基甲酰胺等钝极性溶剂和
氯,提供一种更安全的工业生产工艺。此外,提供一种由于不使用极易成为废物的膦极性溶剂而在经济上更优的生产工艺。
[解决方案]
一种生产由通式(3)代表的
异噻唑化合物的工艺,其中 R 是
氰基或类似物;X 是
氯原子或类似物,该工艺包括加热由通式(1)代表的腈化合物(其中 R 如上文所定义)和
硫,然后在由通式(1)代表的腈化合物、
硫和由通式(2)代表的卤素(其中 X 如上文所定义)之间进行反应。