反应详情

温度

48 °C

7-Dimethoxymethylimidazo[1,2-α]pyrimidine (1.00 g, 5.18 mmol) was dissolved in 3N hydrochloric acid and heated at 48° C. for 14 h. The solution was layered with ethyl acetate (30 ml) and solid sodium hydrogencarbonate (1.06 g, 12.6 mmol) was added in portions over 5 min. The mixture was diluted with water (6 ml) and extracted with dichloromethane (5×50 ml). The combined organics were dried over anhydrous sodium sulfate, filtered and evaporated to give imidazo[1,2-α]pyrimidine-7-carbaldehyde (749 mg, 99%) as a yellow solid: δH (360 MHz, CDCl3) 7.53 (1H, d, J 7), 7.77 (1H, d, J 1), 8.10 (1H, d, J 1), 8.60 (1H, d, J 7), 10.05 (1H, s).

1. additionwas added in portions over 5 min
2. extractionextracted with dichloromethane (5×50 ml)
3. dry with materialThe combined organics were dried over anhydrous sodium sulfate
4. filtrationfiltered
5. customevaporated