反应详情

To (E)-3-(4-(benzyloxy)-3-(methoxymethoxy)phenyl)-1-(2-hydroxy-4-(methoxymethoxy)phenyl)prop-2-en-1-one (450 mg, 1 mmol) in 1.5 mL MeOH was added 4 mL of a 15% NaOH solution, followed by hydrogen peroxide (113 mg, 30% solution). The mixture was stirred at rt for 2 h and additional 226 mg of hydrogen peroxide was added. The reaction was stirred for 15 and quenched onto NaH2PO4 (sat. 50 mL). It was extracted with EtOAc (3×50 mL) and the combined organic phase was dried over MgSO4 and concentrated. The residue was chromatographed (hexane/EtOAc) to afford 2-(4-(benzyloxy)-3-(methoxymethoxy)phenyl)-3-hydroxy-7-(methoxymethoxy)-4H-chromen-4-one as a off-white solid (55 mg, 12%). MS (ESI) m/z 465 (M+H+).

1. stirringThe reaction was stirred for 15
2. customquenched onto NaH2PO4 (sat. 50 mL)
3. extractionIt was extracted with EtOAc (3×50 mL)
4. dry with materialthe combined organic phase was dried over MgSO4
5. concentrationconcentrated
6. customThe residue was chromatographed (hexane/EtOAc)