Cesium carbonate → 3-Methoxy-2-methoxymethoxy-5-(2-oxo-oxazolidin-3-yl)benzaldehyde

HRID 655652

반응식

HRID 655652 반응식
[O:1]1[CH2:5][CH2:4][NH:3][C:2]1=[O:6].CC1(C)C2C=CC=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=2OC2C1=CC=CC=2P(C1C=CC=CC=1)C1C=CC=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+].Br[C:56]1[CH:57]=[C:58]([O:68][CH3:69])[C:59]([O:64][CH2:65][O:66][CH3:67])=[C:60]([CH:63]=1)[CH:61]=[O:62]>C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.[Pd].[Pd].C(OCC)(=O)C.O1CCOCC1>[CH3:69][O:68][C:58]1[C:59]([O:64][CH2:65][O:66][CH3:67])=[C:60]([CH:63]=[C:56]([N:3]2[CH2:4][CH2:5][O:1][C:2]2=[O:6])[CH:57]=1)[CH:61]=[O:62]

참가 물질

8

반응물 4

HCID 10796Cesium carbonateHCID 739492-OxazolidinoneHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 115653225-Bromo-3-methoxy-2-(methoxymethoxy)benzaldehyde

생성물 1

HCID 574825533-Methoxy-2-methoxymethoxy-5-(2-oxo-oxazolidin-3-yl)benzaldehyde수율 49.4%

시약·촉매·용매 3

HCID 9832798Tris(dibenzylideneacetone) dipalladium촉매HCID 8857Ethyl Acetate용매HCID 312751,4-Dioxane용매

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온도
100 °C

실험 절차

2-oxazolidinone (0.38 g, 4.36 mmol), dipalladium tris(dibenzylideneacetone) (0.17 g, 0.18 mmol), 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (XANTPHOS)(0.32 g, 0.55 mmol) and cesium carbonate (1.66 g, 5.1 mmol) were added to a dioxane solution (20 ml) of 5-bromo-3-methoxy-2-methoxymethoxybenzaldehyde (1.0 g, 3.6 mmol) and the mixture was stirred at 100° C. for 24 hours under an argon atmosphere. The reaction solution was cooled to room temperature and ethyl acetate was added thereto. The mixture was filtrated by cerite. The filtrate was washed with water, dried over magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate 4:1→1:1). The purified product was concentrated under reduced pressure. Ethyl acetate and diisopropyl ether were added to the residue. The insoluble matter thus purified was obtained by filtration and dried to obtain 3-methoxy-2-methoxymethoxy-5-(2-oxo-oxazolidin-3-yl)benzaldehyde (0.5 g) as white powder.

후처리

  1. temperatureThe reaction solution was cooled to room temperature
  2. filtrationThe mixture was filtrated by cerite
  3. washThe filtrate was washed with water
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate 4:1→1:1)
  7. concentrationThe purified product was concentrated under reduced pressure
  8. additionEthyl acetate and diisopropyl ether were added to the residue
  9. customThe insoluble matter thus purified
  10. customwas obtained by filtration
  11. customdried

출처 및 근거

ORD 기록
ord-dae1f6bfb85a45d6a67fb97041da02c4
출처 데이터셋
uspto-grants-2011_12
특허 번호
US08071600B2

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