HCID 12300571, compound → HCID 23051865, compound

Participants

Reaction Steps

A solution of 10.5 g (54.6 mmol) of (E)-4-[4-(methylthio)phenyl]but-3-en-2-one and 5.02 g (54.6 mmol) of glyoxylic acid monohydrate in 15 ml of acetic acid was heated at reflux for 20 hours. The reaction mixture was diluted with water and extracted with methylene chloride. The organic phase was extracted twice with 3N sodium hydroxide solution. The combined aqueous phases were treated with 3N hydrochloric acid to produce a strongly acidic reaction and extracted twice with methylene chloride. The combined organic phases were dried over magnesium sulphate and concentrated. Crystallization of the residue from methylene chloride/ether yielded (E,E)-6-[4-(methylthio)-phenyl]-4-oxo-2,5-hexadienoic acid of melting point 160°-163°.

Provenance & Evidence