Sodium Sulfite → HCID 67260857, compound

Participants

Reaction Steps

To a solution of 4-[1-sec-butyl-3-(5-chloro-2-thienyl)-1H-pyrazol-4-yl]pyridine (1 eq, 7.2 mmol) in 23 mL of dichloromethane was added metachloroperbenzoic acid 70% (1.5 eq, 10.9 mmol) in small portion at 0° C. The reaction was then stirred at room temperature overnight. Sodium sulfite (1.5 eq, 10.9 mmol) was then added and the organic layer was then washed with a 2M solution of potassium carbonate, dried over MgSO4, filtered and concentrated to afford 2.25 g of 4-[1-sec-butyl-3-(5-chloro-2-thienyl)-1H-pyrazol-4-yl]pyridine N oxide (83% yield) which was used in the next step without further purification.

Provenance & Evidence