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Following the procedure of G. Drefahl, M. Hartmann and A. Skurk, Chem. Ber. 1966, 99, diethyl oxalate (1.81 mL, 0.0133 mol) and N-methylamino-ethanol (1 g, 0.0133 mol) were dissolved in toluene(50 mL) and heated at reflux for 5 h. The reaction mixture was concentrated to dryness, triturated with ether, and the residue chromatographed (SiO2, 0-5% MeOH in CH2Cl2) to give the title compound.

1. temperatureheated
2. temperatureat reflux for 5 h
3. concentrationThe reaction mixture was concentrated to dryness
4. customtriturated with ether
5. customthe residue chromatographed (SiO2, 0-5% MeOH in CH2Cl2)