Sulfuric Acid → HCID 86630407, compound

Participants

Reaction Steps

3-(2,4-Dimethoxy-phenyl)-1-methyl-1H-pyrazolo[3,4-d]pyrimidin-6-ylamine (Example 89) (1 g, 3.50 mmol) is dissolved in concentrated sulfuric acid (25 ml) to give a blood red solution. The reaction mixture is stirred at room temperature overnight, poured onto ice-water (200 ml) and the resulting solid is collected by filtration, washed with water and dried under vacuum to afford the title compound.

Provenance & Evidence