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

Participants

Reaction Steps

Potassium tert-butoxide (2.03 g, 21.1 mmol) in tetrahydrofuran (20 mL) was mixed with diethyl cyanomethylphosphonate (3.54 g, 20.0 mmol) in tetrahydrofuran (20 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) obtained in Reference Synthetic Examplea 112 in-tetrahydrofuran (20 mL) under cooling with ice and then stirred at room temperature for 1 day. After addition of water, the reaction mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium chloride, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The 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