反应详情

温度

20 °C

0.38 g (1.7 mmol) of 2-chloromethyl-3,4-dimethoxypyridinium chloride is added to a solution of 0.46 g (1.7 mmol) of 2-mercapto-5-(1,1,2,2-tetra fluoroethoxy)-1H-benzimidazole in 10 ml of ethanol, 10 ml of water and 1.8 ml of 2N sodium hydroxide solution; after the mixture has been stirred at 20° C. for one hour, a further 10 ml of water are added dropwise. The mixture is then stirred at 20° C. for a further four hours. The solid which has precipitated out is filtered off, washed with 0.01N sodium hydroxide solution and then with water until neutral and dried to constant weight. 0.63 g (90% of theory) of the title compound is obtained as a colorless crystalline powder of m.p. 98°-102° C.

1. stirringThe mixture is then stirred at 20° C. for a further four hours
2. customThe solid which has precipitated out
3. filtrationis filtered off
4. washwashed with 0.01N sodium hydroxide solution
5. dry with materialwith water until neutral and dried to constant weight