Dimethylformamide → Bisegliptin

Participants

Reaction Steps

Ethyl 4-aminobicyclo[2.2.2]octane-1-carboxylate hydrobromide (612 mg), potassium carbonate (608 mg) and N,N-dimethylformamide (4 mL) were mixed together. To this mixture, (2S,4S)-4-fluoro-1-[2-(benzenesulfonyloxy)acetyl]pyrrolidine-2-carbonitrile (625 mg) was added at 40° C. and the mixture was further stirred for 1 hour. Subsequently, water (10 mL) was added and the resulting crystal was collected by filtration. This product was washed with water (5 mL) and dried at 50° C. under reduced pressure to give (2S,4S)-1-[2-[(4-ethoxycarbonylbicyclo[2.2.2]oct-1-yl)amino]ac etyl]-4-fluoropyrrolidine-2-carbonitrile as a colorless powder (581 mg, 83% yield). This compound was identical to the compound obtained in Example 7.

Provenance & Evidence