2-Piperidone → HCID 86740390, compound

Participants

Reaction Conditions

Reaction Steps

Into a flask equipped with magnetic stirrer, thermometer, nitrogen inlet tube, and Dean-Stark trap were placed 25.0 parts of valerolactam (5-pentanelactam), 47.8 parts of para-toluenesulfonic acid monohydrate and 74.7 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 146.9 parts of methanol. The mixture was stirred and filtered to yield the [(4-butoxycarbonyl)butyl]ammonium tosylate. The aforesaid latent acid catalyst had a solids content of 30 percent in methanol and butanol.

Provenance & Evidence