Hydrochloric Acid → HCID 12535802, compound

Participants

Reaction Steps

2-Isopropoxybenzamidine hydrochloride (10.0 g., 0.0465 mole) was added to a stirred, cooled (ice-water) solution of sodium 2.14 g., 0.093 g-atom) in ethanol (100 ml.). To this cooled, stirred solution was added dropwise a solution of diethyl ethoxymethylenemalonate (10.1 g., 0.0465 mole) in ethanol (30 ml.) over a 10 minute period. The mixture was refluxed for 2 hours and stored at 22° for 18 hours. The mixture was then poured onto ice-water containing acetic acid (10 ml.) and concentrated HCl (10 ml.) to precipitate the desired product. The precipitate was washed and dried to give 15.5 g. of the title product, m.p. 123° 124°. Recrystallizations from ethyl acetate and then cyclohexane gave colorless crystals of the ester, m.p. 128°-130°.

Provenance & Evidence