4-Aminophenol → 1-(4-Hydroxyphenyl)-5-oxopyrrolidine-3-carboxylic acid

Participants

Reaction Steps

A mixture of 2.355 mol of 4-aminophenol and 2.32 mol of itaconic acid was heated gradually: At 60° C., the powder started to become viscous, at 110–120° C. it became liquid and the colour turned to dark brown while the rest of solid material was also dissolved. The exothermic reaction started under boiling, and the temperature rose to 150° C. The sandy product was left to cool down to RT within 1–2 hours. The obtained crude (RS)-1-(4-hydroxyphenyl)-5-oxo-pyrrolidine-3-carboxylic acid was engaged in the next step without further purification or characterisation.

Provenance & Evidence