反应详情

The amide then was treated with Dess-Martin periodinane (180 mg, 0.364 mmol) at room temperature. After stirring for 1 hour, 5 mls of saturated Na2S2O3—NaHCO3 were added. After a further 0.5 hours, the reaction mixture was extracted with ethyl acetate, washed with brine, dried with MgSO4 and concentrated. The residue was purified with silica gel column chromatography to yield 26 mgs of N-[1-(5-Methoxymethyl-[1,3,4]oxadiazole-2-carbonyl)-propyl]-4-oxo-2-benzylsulfonylmethyl-4-piperidin-1-yl-butyramide; H1 NMR(CDCl3): 8, 7.7(1H, d,d, NH, diastereomeric), 7.4–7.2(5H, m), 5.3–5.1(1H, m), 4.6(2H, s, OCH2), 4.3–4.1(3H, m), 3.8–3.2(9H, m), 3–2.4(2H, m), 2.2–1.4(8H, m), 0.95(3H, t); MS: 535.7(M+1).

1. waitAfter a further 0.5 hours
2. extractionthe reaction mixture was extracted with ethyl acetate
3. washwashed with brine
4. dry with materialdried with MgSO4
5. concentrationconcentrated
6. customThe residue was purified with silica gel column chromatography