反应详情

1.55 g (4.92 mmol) of N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-6-nitro-1-benzofuran-2-carboxamide are dissolved in 15 ml of 2 M tin(II) chloride solution in DMF and stirred at room temperature overnight. Dowex 50WX2-200 ion exchanger resin is added and, within 1 h, the mixture is concentrated in a rotary evaporator. The resin is washed successively with water, DMF, methanol, dichloromethane, methanol and 10% triethylamine in methanol. The product fraction is concentrated and chromatographed on silica gel (mobile phase: dichloromethane/methanol/triethylamine). Concentration in vacuo results in 642.8 mg (45.8% of theory) of the title compound.

1. additionDowex 50WX2-200 ion exchanger resin is added and, within 1 h
2. concentrationthe mixture is concentrated in a rotary evaporator
3. washThe resin is washed successively with water, DMF, methanol, dichloromethane, methanol and 10% triethylamine in methanol
4. concentrationThe product fraction is concentrated
5. customchromatographed on silica gel (mobile phase: dichloromethane/methanol/triethylamine)
6. concentrationConcentration in vacuo