反应详情

3-[(5-Nitro-1-benzofuran-7-yl)oxy]quinuclidine (1.38 g, 4.79 mmol; obtained in Step 1) was dissolved in ethanol:THF (100 mL: 25 mL) and Raney-nickel (slurry in ethanol; 6 mL) and hydrazine (891 μL, 0.18 mmol) were added. The mixture was stirred at room temperature for 3 h and then filtered through Celite and the solvent was removed in vacuo. The crude product was purified by flash chromatography [eluent: DCM:methanol (6:1) and chloroform:MeOH:triethylamine (9:1:0.1)] to give 7-(1-azabicyclo[2.2.2]oct-3-yloxy)-1-benzofuran-5-amine (500 mg; 40%).

1. filtrationfiltered through Celite
2. customthe solvent was removed in vacuo
3. customThe crude product was purified by flash chromatography [eluent: DCM:methanol (6:1) and chloroform:MeOH:triethylamine (9:1:0.1)]