Triethylamine → tert-Butyl (2S)-2-(1H-imidazol-2-yl)pyrrolidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 4 (11.09 g, 25.3 mmol), ammonium acetate (29.25 g, 38.0 mmol) and triethylamine (38.45 g, 38.0 mmol) in xylenes (600 mL) in a sealed tube was stirred at 140° C. for 2 h. After being cooled, the reaction mixture was transferred into a flask and concentrated to dryness. The residue was partitioned between chloroform and H2O, and the organic layer was washed with H2O and concentrated. The crude product was purified by silica gel column chromatography (NH4OH/acetonitrile/ethyl acetate: 1/8/100=(v/v/v)) to afford 5 (8.22 g, 75% yield) as a white solid. LC-MS (ESI): m/z 420.1 (M+H)+.

Provenance & Evidence