2-Hydrazinopyridine → HCID 178515860, compound

Participants

Reaction Steps

Compound 2a (1.03 g, 5.0 mmol) prepared in Step 1 of Example A-1 was charged in a 25 mL round-bottom flask and dissolved in 6 mL of ethanol. A solution of 2-hydrazinopyridine (0.55 g, 5.0 mmol, manufactured by Aldrich) in 5 mL of ethanol at 50° C. was gradually added thereto over 30 minutes, followed by reaction for 1 hour. After completion of the reaction was confirmed by TLC, the reaction solution was concentrated by evaporation, extracted with ethyl acetate, washed with saturated brine, dried over anhydrous sodium sulfate, concentrated, and then purified by column chromatography [n-Hex/EtOAc=3/1 (v/v)] to afford a compound of 3-benzyl-1-(pyridin-2-yl)-1H-pyrazol-5-ol (3a).

Provenance & Evidence