Sodium Azide → HCID 86648400, compound

Participants

Reaction Steps

A solution of the crude (2R,4S)-4-[(3,5-bis-trifluoromethyl-benzyl)-cyano-amino]-2-ethyl-pyrrolidine-1-carboxylic acid tert-butylester (52 mg, 0.11 mmol), sodium azide (72 mg, 1.11 mmol) ammonium chloride (60 mg, 1.11 mmol) in DMF (2 mL) is stirred at 90° C. for 12 hours. The reaction mixture is diluted with water after letting it cool to room temperature. The product is extracted twice with EtOAc. The combined organic layer is washed with water and brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The obtained residue is passed through silica pad (eluent: n-hexane/EtOAc) to give crude (2R,4S)-4-[(3,5-bis-trifluoromethyl-benzyl)-(2H-tetrazol-5-yl)-amino]-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (52 mg).

Provenance & Evidence