Malononitrile → 2-(1-Ethoxypropylidene)malononitrile

Participants

Reaction Steps

33.03 g (0.5 mol) of malonodinitrile and 88.13 g (99.02 ml, 0.5 mol) of triethyl orthopropionate are heated at 100° C. for two hours, and the ethanol which is formed during this is distilled off overhead. The reaction mixture is left to cool and added to ca. 500 ml of water. The aqueous phase is extracted with ethyl acetate, then the organic phase is dried with sodium sulfate and, after filtering off the drying agent, is concentrated by evaporation. The resulting 72 g (purity ca. 90%) of (1-ethoxy-propylidene)malononitrile are used in the subsequent step without further purification.

Provenance & Evidence