Ethyl Acetate → (1-(fur-2-ylmethyl)-1H-benzimidazol-2-yl)(1-ethoxycarbonylpiperidin-4-yl)amine

HRID 323478

Reaktionsgleichung

Reaktionsgleichung von HRID 323478
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][CH:11]1[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:13][CH2:12]1.[H-].[Na+].Cl[CH2:25][C:26]1[O:27][CH:28]=[CH:29][CH:30]=1.C(OCC)(=O)C>O1CCCC1.CN(C)C=O>[O:27]1[CH:28]=[CH:29][CH:30]=[C:26]1[CH2:25][N:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][CH:11]1[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:13][CH2:12]1

Komponenten

7

Edukt 4

HCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 2195202-(Chloromethyl)furanHCID 30184551-Piperidinecarboxylic acid, 4-(1H-benzimidazol-2-ylamino)-, ethyl ester

Produkt 1

HCID 13587981(1-(fur-2-ylmethyl)-1H-benzimidazol-2-yl)(1-ethoxycarbonylpiperidin-4-yl)amine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Combine (1H-benzimidazol-2-yl)-(1-ethoxycarbonyl-piperidin-4-yl)amine (1.5 g, 5.2 mmol) in tetrahydrofuran (45 mL) and dimethylformamide (5 mL). Cool in an ice-bath. Add sodium hydride (0.25 g, 60% n in oil, 6.24 mmol). After 90 minutes, add 2-(chloromethyl)furan (0.90 g, 7.8 mmol). Warm to ambient temperature. After 60 hours, quench by the addition of ice and then a saturated aqueous ammonium chloride solution. Evaporate to remove most of the tetrahydrofuran, dilute with ethyl acetate, and extract with a saturated aqueous sodium bicarbonate solution, water, and then brine. 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-(fur-2-ylmethyl)-1H-benzimidazol-2-yl)(1-(ethoxycarbonyl)piperidin-4-yl)amine: Rf=0.29 (silica gel, ethyl acetate).

Aufarbeitung

  1. temperatureCool in an ice-bath
  2. waitAfter 60 hours
  3. customquench by the addition of ice
  4. customEvaporate
  5. customto remove most of the tetrahydrofuran
  6. additiondilute with ethyl acetate
  7. extractionextract with a saturated aqueous sodium bicarbonate solution, water
  8. dry with materialDry the organic layer over MgSO4
  9. filtrationfilter
  10. customevaporate in vacuo
  11. customto give a residue

Quellen und Nachweise

ORD-Eintrag
ord-51cbebc1dc2147dab6637b51aca85acc
Quelldatensatz
uspto-grants-2001_04
Patentnummer
US06211199B1

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