Water → 1-Carbobenzoxy-4-piperidinecarboxylic Acid

Participants

Reaction Conditions

Reaction Steps

To piperidine-4-carboxylic acid (25 g) in THF (75 ml) there was added water (75 ml) followed by sodium bicarbonate (30.8 g). The mixture was cooled to 0° C., and Cbz chloride (38.9 ml) was added dropwise. The reaction mixture was then stirred for 5 hours at room temperature (TLC monitoring). When the reaction was complete, the organic solvent was distilled off and the residue was taken up in water (200 ml) and washed with ethyl acetate (2×150 ml). The aqueous phase was acidified with dilute aqueous HCl solution and extracted with ethyl acetate. The organic phase was dried (Na2SO4) and concentrated in vacuo.

Provenance & Evidence