Imidazole → (2S,5R)-1-(Chloroacetyl)-5-(prop-1-yn-1-yl)pyrrolidine-2-carbonitrile

Participants

Reaction Steps

To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+.

Provenance & Evidence