反应详情

温度

-5 °C

A 1 M ethylmagnesium bromide/THF solution (2.0 ml) was added in an argon atmosphere at −40° C. to a solution of 405 mg of 5-iodo-7-methylthioimidazo[5,1-b]thiazole in 12 ml of dry THF. The mixture was stirred at the same temperature for 30 min. p-Toluenesulfonyl cyanide (372 mg) was added thereto. The temperature of the system was raised to −5° C. over a period of one hr. A saturated aqueous ammonium chloride solution was added to the reaction mixture. Ethyl acetate was added thereto, followed by washing with saturated brine. The organic layer was dried over anhydrous magnesium sulfate. The solvent was removed by distillation. The residue was purified by column chromatography on silica gel (dichloromethane:ethyl acetate:hexane=3:1:1) to give 131 mg of 5-cyano-7-methylthioimidazo[5,1-b]thiazole.

1. additionwas added
2. washby washing with saturated brine
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. customThe solvent was removed by distillation
5. customThe residue was purified by column chromatography on silica gel (dichloromethane:ethyl acetate:hexane=3:1:1)