反应详情

Add PCC (5.22 g, 24.2 mmol) to a solution of 3-(3-hydroxymethyl-phenyl)-4H-[1,2,4]oxadiazol-5-one (3.10 g, 16.1 mmol) in tetrahydrofuran:dichloromethane (125 mL:125 mL) and stir. After 4 hours concentrate under reduced pressure to give a residue. Purify the residue by flash chromatography eluting with ethyl acetate:hexanes:acetic acid (50%:50%:0.1%) to yield the title product as a white solid (2.20 g, 72%): 1H NMR (DMSO-d6) δ 7.83 (t, 1H), 8.10-8.17 (m, 2H), 8.35 (m, 1H), 10.09 (s, 1H), 13.15 (bs, 1H).

1. concentrationAfter 4 hours concentrate under reduced pressure
2. customto give a residue
3. customPurify the residue by flash chromatography
4. washeluting with ethyl acetate