Isopropyl acetoacetate → HCID 20077494, compound

Participants

Reaction Steps

750 mg (3.2 mmol) of 3-phenyl-5-cinnolinecarboxaldehyde, 263 mg (3.2 mmol) of 3-aminocrotononitrile and 457 mg (3.2 mmol) of isopropyl acetoacetate are boiled under reflux for 2.5 days in 25 ml of ethanol. The mixture is concentrated and separated on a silica gel column using toluene/ethyl acetate mixtures. The desired fractions are collected and concentrated. The evaporation residue obtained is crystallised using ether and filtered off with suction. 320 mg of crystals of melting point 200°-202° C. are obtained.

Provenance & Evidence