反应详情

A mixture of 1-(1-benzylpiperidin-3-yl)-3,6-dihydropyrazolo[4,3-d]pyrrolo[2,3-b]pyridine (0.18 g, 0.54 mmol), Pearlman's catalyst (0.05 g, 0.36 mmol) and ammonium formate (0.684 g, 10.8 mmol) was heated in EtOH (20 mL) at reflux for about 1 h. The catalyst was removed by filtration through a Celite® pad and the filtrate concentrated in vacuo to yield 1-(piperidin-3-yl)-3,6-dihydropyrazolo[4,3-d]pyrrolo[2,3-b]pyridine (0.13 g, 0.543 mmol, quantitative) as a yellow amorphous solid that was used directly in the next step without further purification: LC/MS (Table 2, Method a) Rt=1.31 min; MS m/z: 242 (M+H)+.

1. temperatureat reflux for about 1 h
2. customThe catalyst was removed by filtration through a Celite® pad
3. concentrationthe filtrate concentrated in vacuo