Ethyl Acetate → HCID 18464522, Verbindung

HRID 2230698Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2230698
[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][CH2:12][N:11]([C:15]2[NH:19][C:18]3[CH:20]=[CH:21][CH:22]=[CH:23][C:17]=3[N:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[Si:26]([O:33][CH2:34][CH2:35]I)([C:29]([CH3:32])([CH3:31])[CH3:30])([CH3:28])[CH3:27].C(OCC)(=O)C>O1CCCC1.CN(C)C=O>[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][CH2:12][N:11]([C:15]2[N:16]([CH2:35][CH2:34][O:33][Si:26]([C:29]([CH3:32])([CH3:31])[CH3:30])([CH3:28])[CH3:27])[C:17]3[CH:23]=[CH:22][CH:21]=[CH:20][C:18]=3[N:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Komponenten

7

Edukt 4

HCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 11129873tert-Butyl(2-iodoethoxy)dimethylsilaneHCID 184646551-t-butoxycarbonyl-4-(1H-benzimidazol-2-yl)[1,4]diazepane

Produkt 1

HCID 18464522HCID 18464522, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Combine 1-(t-butoxycarbonyl)-4-(1H-benzimidazol-2-yl)[1,4]diazepane (3.06 g, 9.67 mmol) and sodium hydride (0.43 g, 60% in oil, 10.64 mmol) in tetrahydrofuran (60 mL) and dimethylformamide (6 mL). After 2 hours, add 2-(t-butyldimethylsilyloxy)ethyl iodide (2.78 g, 9.67 mmol). After 20 hours, heat to reflux. After 4 hours, cool to ambient temperature and add ice to quench. Evaporate in vacuo to remove most of the tetrahydrofuran. Partition the evaporated reaction mixture between ethyl acetate (250 mL) and water (200 mL). Separate the layers and extract the organic layer with water. Dry the organic layer over MgSO4, filter, and evaporate in vacuo to give a residue. Chromatograph the residue on silica gel eluting with ethyl acetate to give 1-(t-butoxycarbonyl)-4-(1-(2-(t-butyldimethylsilyloxy)ethyl)-1H-benzimidazol-2-yl)[1,4]diazepane: Rf=0.58 (silica gel, ethyl acetate).

Aufarbeitung

  1. waitAfter 20 hours
  2. temperatureheat to reflux
  3. waitAfter 4 hours
  4. additionadd ice
  5. customto quench
  6. customEvaporate in vacuo
  7. customto remove most of the tetrahydrofuran
  8. customPartition
  9. customthe evaporated reaction mixture between ethyl acetate (250 mL) and water (200 mL)
  10. customSeparate the layers
  11. extractionextract the organic layer with water
  12. dry with materialDry the organic layer over MgSO4
  13. filtrationfilter
  14. customevaporate in vacuo
  15. customto give a residue

Quellen und Nachweise

ORD-Eintrag
ord-c5d72ce9220a4ff7b0c72fcd16fa3e08
Quelldatensatz
uspto-grants-2002_07
Patentnummer
US06423704B1

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