Hydrochloric Acid → HCID 54508334, compound

Participants

Reaction Steps

A finely powdered mixture of phthalic anhydride (34 g.; 0.23 mole) and cyanoacetic acid (22 g.; 0.26 mole) was dissolved in dry pyridine (28 ml) and the mixture stirred for 6 hours at 60°-70° C. After cooling overnight the dark solid was treated with water (800 ml) and brought to pH 4-5 with hydrochloric acid. The resulting yellow solid was filtered off, washed well with water and recrystallised from glacial acetic acid, m.p. 178°-180° C. (lit. m.p. 195° C.).

Provenance & Evidence