反应详情

Upon stirring 3 mL of DMF at room temperature, neat phosphorous oxychloride (0.8 mL 1.3 equivalents) was added dropwise. The resulting mixture was stirred at room temperature for 10 minutes, followed by dropwise addition of neat 2-isopropylpyrazolo[1,5-a]pyridine (1 g, 1 equivalent). The solution was stirred at room temperature for 19 hours and poured into 100 mL of ice water. The pH of the aqueous solution was adjusted to 8 using solid NaOH. The precipitate formed was collected by filtration and dried under reduced pressure to furnish 2-isopropylpyrazolo[1,5-a]pyridine-3-carbaldehyde (0.97 g, 82% yield) as a white solid. Compound 1073.

1. stirringThe solution was stirred at room temperature for 19 hours
2. customThe precipitate formed
3. filtrationwas collected by filtration
4. customdried under reduced pressure