Water → HCID 67500703, compound

Participants

Reaction Steps

Compound (158a) (1.50 g) and iodoethane (2.8 mL) were dissolved in DMF (35 mL), and sodium hydride (0.335 g, a 55% dispersion in paraffin liquid) was added to the resulting solution under ice cooling, followed by stirring for 20 min. Water was added to the reaction solution, and the precipitate was collected by filtration and dried under reduced pressure to obtain 3-(ethylamino)-4-{4-iodo-3-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl}benzonitrile, which was used in the subsequent reaction without being purified. This 3-(ethylamino)-4-{4-iodo-3-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl}benzonitrile was dissolved in DMSO (15 mL), and a hydrogen peroxide solution (30 wt %) (0.563 mL) and a 4 mol % aqueous sodium hydroxide solution (2.48 mL) were added to the resulting solution, followed by stirring at room temperature for 20 min. Water was added to the reaction solution, and the precipitate was collected by filtration and was dried under reduced pressure to obtain compound (162a) (1.29 g, the second stage yield: 78%) as a white solid.

Provenance & Evidence