Trichloroisocyanuric Acid → 3-(3-Chloro-2-methoxy-5-trifluoromethyl-phenyl)-1-methyl-1H-pyrazolo[3,4-d]pyrimidin-6-ylamine

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Reaction Steps

3-(2-Methoxy-5-trifluoromethyl-phenyl)-1-methyl-1H-pyrazolo[3,4-d]pyrimidin-6-ylamine (Example 88) (526 mg, 1.62 mmol) is dissolved in concentrated sulfuric acid (98%, 15 ml) and trichloroisocyanuric acid (126 mg, 0.54 mmol) is added. The reaction mixture is stirred at room temperature for 3 days, poured onto ice water (100 ml) and stirred for 30 minutes. The resulting precipitate is collected by filtration and dried under vacuum to afford the title compound as the sulfate salt.

Provenance & Evidence