tert-Butanol → (R)-4-((R)-benzyl-2-oxo-oxazolidin-3-yl)-3-(4-benzyloxy-2,6-dichloro-benzyl)-4-oxo-butyraldehyde

HRID 1013796

반응식

HRID 1013796 반응식
[CH2:1]([C@@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:36])[C@H:15]([CH2:19][C:20]1[C:25]([Cl:26])=[CH:24][C:23]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)=[CH:22][C:21]=1[Cl:35])[CH2:16][CH:17]=C)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1C[O:40]CC1.C(O)(C)(C)C.I([O-])(=O)(=O)=O.[Na+]>[Os](=O)(=O)(=O)=O.O>[CH2:1]([C@@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:36])[C@H:15]([CH2:19][C:20]1[C:25]([Cl:26])=[CH:24][C:23]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)=[CH:22][C:21]=1[Cl:35])[CH2:16][CH:17]=[O:40])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

7

반응물 4

HCID 6386tert-ButanolHCID 8028TetrahydrofuranHCID 23667635Sodium periodateHCID 66671784(R)-4-benzyl-3-[(S)-2-(4-benzyloxy-2,6-dichloro-benzyl)-pent-4-enoyl]-oxazolidin-2-one

생성물 1

HCID 59515429(R)-4-((R)-benzyl-2-oxo-oxazolidin-3-yl)-3-(4-benzyloxy-2,6-dichloro-benzyl)-4-oxo-butyraldehyde수율 48%

시약·촉매·용매 2

HCID 30318Osmium Tetroxide촉매HCID 962Water용매

실험 절차

Alternatively, treat a mixture of (R)-4-benzyl-3-[(S)-2-(4-benzyloxy-2,6-dichloro-benzyl)-pent-4-enoyl]-oxazolidin-2-one (0.96 g, 1.8 mmol), THF (21 mL) and water (7 mL) with 2.5% osmium tetroxide in t-butanol (46 mg, 0.18 mmol). Add sodium periodate (1.17 g, 5.5 mmol) and stir the reaction 4 hr at room temperature. Quench the reaction with water and extract with ethyl acetate. Wash the organic phase with aqueous 1N sodium thiosulfate then brine. Dry the organic layer over magnesium sulfate, filter, and concentrate under vacuum. Purify the crude material by silica gel chromatography using hexanes:ethyl acetate to elute the pure product. Concentrate the fractions containing product under vacuum to afford 0.46 g (48%) of desired product. MS (m/z): 526 (M+).

후처리

  1. additionAlternatively, treat
  2. customthe reaction 4 hr at room temperature
  3. customQuench
  4. customthe reaction with water
  5. extractionextract with ethyl acetate
  6. washWash the organic phase with aqueous 1N sodium thiosulfate
  7. dry with materialDry the organic layer over magnesium sulfate
  8. filtrationfilter
  9. concentrationconcentrate under vacuum
  10. customPurify the crude material by silica gel chromatography
  11. washethyl acetate to elute the pure product
  12. concentrationConcentrate the fractions
  13. additioncontaining product under vacuum

출처 및 근거

ORD 기록
ord-7e144f55ef0e4094aafa7decaa9f412a
출처 데이터셋
uspto-grants-2011_07
특허 번호
US07981918B2

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