2-Pyrrolidone → HCID 86740391, compound

Participants

Reaction Conditions

Reaction Steps

Into a reactor flask equipped with magnetic stirrer, thermometer, nitrogen inlet tube, and Dean-Stark trap were placed 47.0 parts of 2-pyrrolidinone (4-butanelactam), 109.4 parts of para-toluenesulfonic acid monohydrate, and 197.4 parts of butanol. The aforesaid mixture was placed under nitrogen atmosphere, heated to reflux to azeotropically remove any water present, and maintained at reflux until a constant acid value was attained. (The acid value was determined by the procedure described in Example I, above.) The reaction mixture was allowed to cool to 60° C. followed by the addition of 280.8 parts of methanol over a five-minute period. The mixture was stirred and filtered to yield the [(3-butoxycarbonyl)propyl]ammonium tosylate. The aforesaid latent acid catalyst had a solids content of 30 percent in methanol and isobutanol.

Provenance & Evidence