反应详情

A mixture of 2-isopropylpyrazolo[1,5-a]pyridine-3-carbaldehyde (1.5 g, 1 equivalent) and potassium permanganate (2.9 g, 2.1 equivalents) in 10 mL of THF was stirred at room temperature for 2 days. A solution of potassium hydroxide (2.2 g, 5 equivalents) in 10 mL of water was added and the resulting solution was stirred at room temperature for 2 hours. The mixture was filtered to remove insoluble solids and the filtrate was extracted to remove unreacted aldehyde. The remaining aqueous solution was acidified with concentrated HCl and the precipitates were collected by filtration and dried under reduced pressure to give 2-isopropylpyrazolo[1,5-a]pyridine-3-carboxylic acid (0.98 g, 60% yield) as a solid. Compound 1079.

1. stirringthe resulting solution was stirred at room temperature for 2 hours
2. filtrationThe mixture was filtered
3. customto remove insoluble solids
4. extractionthe filtrate was extracted
5. customto remove unreacted aldehyde
6. filtrationthe precipitates were collected by filtration
7. customdried under reduced pressure