反应详情

2N NaOH(aq) (0.6 mL) was added to a solution of 31.3 (100 mg, 0.42 mmol) in acetone (1 mL). The reaction was stirred at room temperature overnight and then taken up in water. The aqueous solution was acidified with 1N HCl(aq) (1.5 mL) and extracted with ethyl acetate. The organic extracts were washed with brine, dried (Na2SO4), and concentrated in vacuo. The resultant residue was purified via radial chromatography (20% ethyl acetate in hexanes) to yield 74 mg (63%) of 4-[2-Methyl-4-(2-methyl-benzyloxy)-phenyl]-but-3-en-2-one (31.4). LC/MSD m/e: 281.4 (M+H); 1H NMR (400 MHz) (acetone-d6) δ 7.83 (1H, d, J=16), 7.70 (1H, m), 7.46 (1H, m), 7.25 (3H, m), 6.96 (2H, m), 6.63 (1H, d, J=16 Hz).

1. extractionextracted with ethyl acetate
2. washThe organic extracts were washed with brine
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated in vacuo
5. customThe resultant residue was purified via radial chromatography (20% ethyl acetate in hexanes)