Hydrogen Bromide → HCID 86656434, compound

Participants

Reaction Steps

Bromine (57.9 μL, 1.13 mmol) was added to a solution of 1-[6-(4-fluorophenyl)pyrazolo[1,5-a]pyridine-3-yl]ethanone (8, 197 mg, 0.775 mmol) in AcOH (1 mL) and hydrobromic acid (88 μL, 0.775 mmol). The reaction was heated to 50° C. for 2 hours after which an aqueous solution of 10% Na2S2SO3 (5 mL) and dichloromethane (10 mL) were added to the reaction. The organic was collected and washed with a saturated solution of sodium bicarbonate (10 mL), dried over sodium sulfate and concentrated. The reaction was purified by column chromatography (10% acetone in hexanes) to yield 2-bromo-1-[6-(4-fluorophenyl)pyrazolo[1,5-a]pyridine-3-yl]ethanone (9, 220.4 mg, 0.662 mmol, 85% yield). MS APCI: [M+H]+ m/z 334.2.

Provenance & Evidence