4-Ethoxyaniline → HCID 178466725, compound

Participants

Reaction Steps

The crude product (9.25 mg) of 7-chloro-5-hydroxy-6-methylpyrazolo[1,5-a]pyridine-4-carbonitrile (13) was dissolved in 2-propanol (2.2 mL). To this solution, p-phenetidine (289 μL) was added and the mixture was stirred under reflux with heating for 3 days. After cooled to room temperature, the reaction solution was diluted with ethyl acetate. This solution was washed with a mixture of brine and 1 mol/L hydrochloric acid (1:1) and then with a mixture of brine and saturated aqueous sodium hydrogen carbonate solution (9:1) and dried over sodium sulfate. After the solvent was removed under reduced pressure, the residue was purified with silica-gel column chromatography (hexane/ethyl acetate=1/1) to obtain the title compound (21) (77.8 mg, Yield 56%).

Provenance & Evidence