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

HRID 655652

反応式

HRID 655652 の反応式
[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]

参加物

8

反応物 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

生成物 1

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

試薬・触媒・溶媒 3

HCID 9832798Tris(dibenzylideneacetone) dipalladium触媒HCID 8857Ethyl Acetate溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
100 °C

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-dae1f6bfb85a45d6a67fb97041da02c4
出典データセット
uspto-grants-2011_12
特許番号
US08071600B2

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