反应详情

Glacial acetic acid (2.78 g, 46.3 mmol) was slowly added to a solution of 5-nitro-2-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyrimidine (1.5 g, 5.8 mmol) and iron powder (1.94 g, 34.7 mmol) in methanol (30 mL). The reaction was stirred at room temperature for 3 hours. The reaction was then diluted with ethyl acetate (50 mL) and filtered through Celite. The filtrate was neutralized with saturated aqueous potassium carbonate. The organic layer was separated and washed with water and brine, dried over sodium sulfate, filtered, and concentrated to give 2-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyrimidin-5-amine (850 mg, 64%) as a yellow solid. 1H NMR (400 MHz, CDCl3, δ): 8.68 (s, 1H), 8.16 (s, 2H), 7.87 (s, 1H), 3.82 (s, 2H).

1. filtrationfiltered through Celite
2. customThe organic layer was separated
3. washwashed with water and brine
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated