Diethyl Malonate → HCID 20155910, compound

Participants

Reaction Conditions

Reaction Steps

(i) Diethyl malonate (1.16 g) was added to a solution of sodium (158 mg) in dry absolute ethanol (10 ml) and the mixture was heated to reflux. 1-(2-Thiazolyl)but-1-en-3-one (1.0 g) in dry absolute ethanol (5 ml) was added dropwise to the solution. After refluxing for 2.5 hr, an aqueous potassium hydroxide solution (862 mg in 12 ml) was added and the mixture was extracted with diethyl ether. The aqueous layer was heated to 70° C. and neutralised with dilute hydrochloric acid and the water was then evaporated under reduced pressure. The residue was extracted with dry dimethylformamide. Evaporation of the solvent gave 3-hydroxy-5-(2-thiazolyl)cyclohex-2-en-1-one.

Provenance & Evidence