Oxalyl chloride → 5-Methyl-1-(4-methylbenzyl)-1H-pyrazole-3-carbonyl chloride

Participants

Reaction Conditions

Reaction Steps

5-methyl-1-(4-methylbenzyl)-1H-pyrazole-3-carboxylic acid (Intermediate B, 390 mg, 1.69 mmol), was dissolved in dichloromethane (26 mL) and cooled to 0° C. Oxalyl chloride was added (0.79 mL, 8.47 mmol) along with 1 drop of DMF. The ice bath was removed and the mixture was stirred at rt for 30 min before the solvent was evaporated. The residue was used in the next step with no further purification or characterization.

Provenance & Evidence