反应详情

Sodium hydride (417 mmol) was added to a solution of ethyl 3-oxobutanoate (129 mmol) in tetrahydrofuran (350 mL). 1-Chloro-2,4-dinitrobenzene (123 mmol) was added and the resulting suspension was maintained for 24 h at rt. The pH was adjusted to 5 by the addition of 3 M hydrochloric acid and the resulting solution was extracted with diethyl ether (300 mL). The organic layer was washed with water (3×300 mL), dried (magnesium sulfate), and concentrated to provide ethyl 2-(2,4-dinitrophenyl)-3-oxobutanoate in 98% yield as a brown solid.

1. extractionthe resulting solution was extracted with diethyl ether (300 mL)
2. washThe organic layer was washed with water (3×300 mL)
3. dry with materialdried (magnesium sulfate)
4. concentrationconcentrated