N-[(3R)-1-Azabicyclo[2.2.2]oct-3-yl]-6-nitro-1-benzofuran-2-carboxamide → 6-Amino-N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-1-benzofuran-2-carboxamide

Beteiligte Stoffe

Reaktionsschritte

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.

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