反应详情

温度

50 °C

2-Butoxy-2-oxoethanaminium chloride (573.5 g, 3.42 mol) was suspended in 7 L of ethanol and triethylamine (415 g, 4.1 mol) was added. Diethyloxalate (1.0 Kg, 6.8 mol) was added and the reaction warmed to 50° C. for 3 hours. The reaction was cooled, the volatiles were removed under vacuum and the residue was dissolved in methylene chloride and washed with two 4 L portions of water and dried over MgSO4. The next day the reaction was filtered, evaporated to give ˜1.2 Kg of an oil that was chromatographed on silica eluting with Heptane/EtOAc to give product.

1. temperatureThe reaction was cooled
2. customthe volatiles were removed under vacuum
3. dissolutionthe residue was dissolved in methylene chloride
4. washwashed with two 4 L portions of water
5. dry with materialdried over MgSO4
6. filtrationThe next day the reaction was filtered
7. customevaporated