反应详情

To a stirred solution of 4-hydroxy-4-methyl-1-(4-nitrophenyl)pent-2-yn-1-one (1.74 g, 7.46 mmol, 1 eq) in ethanol (30 mL), a solution of diethylamine (778 mg, 7.46 mmol, 1 eq) in EtOH (5 mL) was added dropwise at RT. The reaction mixture was then stirred for additional 90 min. The ethanol was removed, and the mixture was then diluted with EtOAc (100 mL). The combined organic layers were washed with water (50 mL) and brine (20 mL), dried over Na2SO4, filtered, and concentrated in vacuo to afford 2,2-dimethyl-5-(4-nitrophenyl)furan-3(2H)-one (1.6 g, 92%) which was used in the next step without further purification.

1. customThe ethanol was removed
2. additionthe mixture was then diluted with EtOAc (100 mL)
3. washThe combined organic layers were washed with water (50 mL) and brine (20 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo