Ethyl 2-Formylpropionate → 4-Methyl-1-(3,4-dichlorobenzyl)-pyrazol-5-one

Beteiligte Stoffe

Reaktionsschritte

10.9 g of 3,4-dichlorobenzylhydrazine were added dropwise to a solution of 7.5 g of a α-formylpropionic acid ethyl ester in 50 ml of ethanol. After stirring overnight at room temperature, the solvent was distilled off in vacuo and the solid residue was recrystallized from ethanol.

Herkunft & Nachweise