Hexane → 5-Methyl-1-phenylpyrazole-3-carbaldehyde

Participants

Reaction Steps

3-Ethoxycarbonyl-1-phenyl-5-methylpyrazole (3.482 g, 15.12 mmol) was dissolved in 20 mL of purified methylene chloride, and then dropwisely added with DIBAL (45.36 mL, 45.36 mmol) at −78° C. and stirred. Termination of the reaction was confirmed by TLC (hexane:ethyl acetate=5:1). Upon completion of reaction, the reaction mixture was dropwisely added with methanol and water, and then extracted with methylene chloride. The resulting organic layer was dried with anhydrous magnesium sulfate and filtered, and the filtrate was concentrated and dried in vacuo to obtain the target compound, 3-formyl-5-methyl-1-phenylpyrazole.

Provenance & Evidence