Ethyl cyanoacetate → HCID 13851039, compound

Participants

Reaction Steps

A mixture of 6-isopropenyl-4-oxo-4H-1-benzopyran-3-carbonitrile (800 mg), ethanol (40 ml), piperidine (0.6 ml) and ethyl cyanoacetate (0.7 ml) was subjected to reflux for three hours, which was then left standing at room temperature overnight. Precipitating crystals were collected by filtration, which were recrystallized from ethanol to afford colorless crystals (1.09 g) of ethyl 2-amino-7-isopropenyl-5-oxo-5H-[1]benzopyrano[2,3-b]pyridine-3-carboxylate, m.p. 227°-230° C. (decomp.).

Provenance & Evidence