反应详情

30 g (0.125 mol) of ethyl (3-ethoxy-2-oxocyclohex-3-en-1-yl)(oxo)acetate were dissolved in 150 mL of glacial acetic acid and 6.5 mL of methylhydrazine were added. The mixture was stirred at room temperature for 6 hours. The solvent was then evaporated and the crude redissolved with water, the solution made basic with 30% NH4OH and extracted with chloroform. The organic layer was then dried over Na2SO4 and concentrated. The residue was chromatographed on a silica gel column (eluant: chloroform) and crystallized from a mixture n-hexane/diethyl ether (TLC chloroform; 63% yield as a white solid).

1. customThe solvent was then evaporated
2. dissolutionthe crude redissolved with water
3. extractionextracted with chloroform
4. dry with materialThe organic layer was then dried over Na2SO4
5. concentrationconcentrated
6. customThe residue was chromatographed on a silica gel column (eluant: chloroform)
7. customcrystallized from a mixture n-hexane/diethyl ether (TLC chloroform