Water → 1-(tert-Butoxycarbonyl)-3-(cyanomethylene)azetidine

Participants

Reaction Steps

Diethyl cyanomethylphosphonate (3.54 g, 20.0 mmom) in tetrahydrofuran (20 mL) was added to potassium tert-butoxide (2.03 g, 21.1 mmol) in tetrahydrofuran (30 mL) under cooling with ice and stirred for 30 minutes. The reaction mixture was mixed with tert-butyl 3-oxoazetidine-1-carboxylate (2.96 g, 17.3 mmol) in tetrahydrofuran (15 mL) and stirred at room temperature for 1 day, and after addition of water, extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane/ethyl acetate=3/1 (v/v)) to give the title compound as a colorless solid (1.93 g, yield 58%).

Provenance & Evidence