反应详情

To a solution of 1-(diphenylmethyl)-3-(hydroxymethyl)-3-[2-hydroxy-4-(trifluoromethoxy)phenyl]-1,3-dihydro-2H-indol-2-one (17.3 mmol) in anhydrous THF (200 mL) was added triphenylphosphine (6.34 g, 24.2 mmol) followed by diethyl azodicarboxylate (4.39 mL, 24.2 mmol) at 0° C. The reaction mixture was stirred at ambient temperature for 16 h, quenched with saturated ammonium chloride (40.0 mL). The aqueous mixture was extracted with ethyl acetate (3×150 mL). The combined organic layers was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo. The residue was subjected to column chromatography (ethyl acetate/hexane, 1/4) to give the title compound (6.00 g, 71%): 1H NMR (300 MHz, CDCl3) δ 7.45-6.51 (m, 18H), 5.08 (d, 1H), 4.81 (d, 1H); MS (ES+) m/z 488 (M+1).

1. customquenched with saturated ammonium chloride (40.0 mL)
2. extractionThe aqueous mixture was extracted with ethyl acetate (3×150 mL)
3. dry with materialThe combined organic layers was dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated in vacuo