反应详情

A 1.0 N lithiumbis(trimethylsilyl)amide/n-hexane solution (4.8 ml) was added to a solution of 0.68 g of 7-(4-nitrobenzylsulfamoyl)imidazo[5,1-b]thiazole in 20 ml of THF and 4 ml of HMPA in an argon atmosphere at −40° C. The mixture was stirred at the same temperature for 30 min. Tri-n-butylstannyl chloride (0.57 ml) was added thereto. The mixture was stirred at the same temperature for 30 min. A saturated aqueous ammonium chloride solution was added thereto. Ethyl acetate was then added thereto. The mixture was then washed with water and saturated brine in that order. 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 (hexane:ethyl acetate=1:1) to give 0.78 g of the tile compound.

1. stirringThe mixture was stirred at the same temperature for 30 min
2. washThe mixture was then washed with water and saturated brine in that order
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 (hexane:ethyl acetate=1:1)