Dimethylformamide → HCID 20610270, compound

Participants

Reaction Steps

A dimethyl formamide (260 mL) solution of 2-(5-Bromomethyl-isoxazol-3-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (7.29 g, 56 mmol) and 2-allyloxycarbonylamino-malonic acid diethyl ester (8.25 g, 32 mmol) was cooled to 0° C. and cesium carbonate (25.41 g, 78 mmol) was added. The reaction was allowed to warm to room temperature and stirred for 3 hours. The reaction mixture was then poured into diethyl ether (2 L) and washed with water (5×200 mL) and brine. The organic portion was dried over magnesium sulfate and concentrated in vacuo. The crude residue was chromatographed on silica gel eluting with ethyl acetate:hexane (3:7) to afford the title compound as a clear colorless oil (10.95 g; 83%). MS (Cl) m/z 260.1 (M-99).

Provenance & Evidence