Sodium hydride → (1-(fur-2-ylmethyl)-1H-benzimidazol-2-yl)(1-ethoxycarbonylpiperidin-4-yl)amine

HRID 582077Notes

Reaction equation

HRID 582077 reaction equation
[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.[Cl-].[NH4+]>C(OCC)(=O)C.CN(C)C=O.O1CCCC1>[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

Participants

8

Reactant 4

HCID 24758Sodium hydrideHCID 25517Ammonium ChlorideHCID 2195202-(Chloromethyl)furanHCID 30184551-Piperidinecarboxylic acid, 4-(1H-benzimidazol-2-ylamino)-, ethyl ester

Product 1

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

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Combine (1H-benzimidazol-2-yl)(1-ethoxycarbonylpiperidin-4-yl)amine (1.5 g, 5.2 mmol) and tetrahydrofuran (45 mL) and dimethylformamide (5 mL). Cool in an ice bath. Add sodium hydride (0.25 g, 60% in oil, 6.24 mmol). Warm to ambient temperature. After about 90 minutes, when the gas evolution ceases, add 2-(chloromethyl)furan (1.04 g, 8.5 mmol). After 56 hours, add ice and then a saturated aqueous solution of ammonium chloride. Evaporate the reaction mixture 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-ethoxycarbonylpiperidin-4-yl)amine: Rf =0.29 (silica gel, ethyl acetate).

Workup

  1. temperatureCool in an ice bath
  2. waitAfter 56 hours
  3. additionadd ice
  4. customEvaporate the reaction mixture
  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

Sources & evidence

ORD record
ord-40a3be8d13de4c13a80255780d2ffc9c
Source dataset
uspto-grants-1999_07
Patent number
US05922737

Reaction notes

Loading…