Methyl iodide → HCID 18674171, compound

Participants

Reaction Steps

While 2 1m of a dimethylformamide suspension containing 20 mg of 60% sodium hydride was being cooled with ice, 3 ml of a dimethylformamide solution containing 180 mg of 5-(4-fluorophenyl)-1-methyl-3-phenylacetylamino-4-(4-pyridyl)pyrazole was added dropwise thereto, followed by stirring at room temperature for 30 minutes. Then, 2 ml of a dimethylformamide solution containing 80 mg of methyl iodide was added dropwise thereto, followed by stirring at room temperature for 2 hours. After the dimethylformamide was distilled off under reduced pressure, the resulting residue was purified by column chromatography using 30 g of silica gel [with an elution solvent comprising chloroform-methanol (70:1)]. Thus, 149.2 mg (80% yield) of the title compound was obtained as pale-yellow crystals.

Provenance & Evidence