Water → Bisegliptin

Participants

Reaction Steps

Ethyl 4-aminobicyclo[2.2.2]octane-1-carboxylate (92.0 mg) was dissolved in acetonitrile (2 mL) and diisopropylamine (100 μL) was added to the solution. While the mixture was chilled in an ice bath, (2S,4S)-1-(2-bromoacetyl)-4-fluoropyrrolidine-2-carbonitrile (100 mg) in acetonitrile (1 mL) was added dropwise. The mixture was stirred for 1.5 hours while chilled in the ice bath. Subsequently, water was added and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluant: ethyl acetate:methanol=5:1) to give (2S,4S)-1-[[N-(4-ethoxycarbonylbicyclo[2.2.2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile (132 mg).

Provenance & Evidence