Acetyl chloride → HCID 178474354, compound

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Reaction Steps

Then, the obtained pyrazole derivative was dissolved in 50 mL of toluene, and to this solution, 6.0 g of acetyl chloride was added, followed by reflux with heating for 12 hours. After cooling to room temperature, the solvent was distilled off under reduced pressure, the residue was dissolved in 30 mL of ethanol, and 20 mL of a 25mass % ammonia water was added, followed by stirring at room temperature for 30minutes. The solvent was distilled off under reduced pressure, and the obtained solid was washed with diisopropyl ether to obtain 5.2 g of 5-acetylamino-1-(2-fluoro-4-methyl-5-methylthiophenyl)-3-hydroxypyrazole in the form of pale yellow crystals (melting point: 204-205° C.).

Provenance & Evidence