反应详情

温度

0 °C

Diiodine (0.547 g, 2.16 mmol) in ethanol (5 mL) was added dropwise over 5 minutes to a solution of 1-(4-methoxybenzyl)-1H-pyrazolo[3,4-b]pyridin-4-ol (0.50 g, 1.96 mmol, prepared similarly as that described in WO 2007/103308) in absolute ethanol (20 mL) at 0° C. The reaction was stirred at 0° C. for 3 hours, followed by addition of 5% sodium bicarbonate (20 mL). The mixture was concentrated to give a slurry. The pH was then adjusted with saturated KHSO4 to a pH of 4. The resulting solid was collected by filtration and dried to give 5-iodo-1-(4-methoxybenzyl)-1H-pyrazolo[3,4-b]pyridin-4-ol (0.70 g, 94%). MS APCI (+) m/z 382.0 detected.

1. customprepared similarly as
2. customat 0° C
3. concentrationThe mixture was concentrated
4. customto give a slurry
5. filtrationThe resulting solid was collected by filtration
6. customdried