Triethylamine → HCID 20330247, compound

Participants

Reaction Steps

29 g of ethoxalyl chloride are added, in the course of 30 minutes, to 36 g of 4-ethoxybenzhydrazide and 21.3 g of triethylamine in 360 ml of anhydrous dioxane, whilst keeping the temperature of the reaction medium at about 10° C. The stirring is continued (sic) for about two hours, whilst allowing the temperature to return to the ambient value. The reaction mixture is filtered, the filtrate is concentrated under reduced pressure (20 mm Hg, 50° C.) and the residue is stirred in the presence of 200 ml of isopropyl ether and then filtered off. After drying (20° C., 1 mm Hg), 50.8 g of 1-ethoxalyl-2-(4-ethoxybenzoyl)-hydrazine, which melts at 126° C. after a first melting at 120° C., are obtained. Yield: 90.7%.

Provenance & Evidence