Diethyl Oxalate → 6-Trifluoromethyloxindole

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Dimethylsulfoxide (330 mL) was added to 7.9 g of sodium hydride followed by, dropwise, 43.6 g of diethyloxalate. The mixture was heated to 100° C. for 1 hour and cooled to room temperature. 2-Nitro-4-trifluromethyltoluene (31.3 g) was added, the reaction stirred for 30 minutes at room temperature and then heated to 100° C. for 1 hour. The reaction was cooled and poured into a mixture of saturated aqueous ammonium chloride, ethyl acetate and hexane. The organic layer was washed with saturated ammonium chloride, water and brine, dried, and concentrated to give dimethyl

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