Ethyl Acetate → Ethyl 1-[(2'-t-butoxycarbonylbiphenyl-4-yl)methyl]-2-ethyl-4-(1-hydroxy-1-methylethyl)imidazole-5-carboxylate

HRID 265100Notes

Reaction equation

HRID 265100 reaction equation
CC(C)([O-])C.[K+].[CH2:7]([C:9]1[NH:10][C:11]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[C:12]([C:14]([OH:17])([CH3:16])[CH3:15])[N:13]=1)[CH3:8].Br[CH2:24][C:25]1[CH:30]=[CH:29][C:28]([C:31]2[C:32]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])=[CH:33][CH:34]=[CH:35][CH:36]=2)=[CH:27][CH:26]=1.C(OCC)(=O)C>CN(C)C(=O)C.O>[C:40]([O:39][C:37]([C:32]1[CH:33]=[CH:34][CH:35]=[CH:36][C:31]=1[C:28]1[CH:29]=[CH:30][C:25]([CH2:24][N:10]2[C:11]([C:18]([O:20][CH2:21][CH3:22])=[O:19])=[C:12]([C:14]([OH:17])([CH3:16])[CH3:15])[N:13]=[C:9]2[CH2:7][CH3:8])=[CH:26][CH:27]=1)=[O:38])([CH3:43])([CH3:42])[CH3:41]

Participants

7

Reactant 4

HCID 8857Ethyl AcetateHCID 9906257tert-Butyl 4'-(bromomethyl)biphenyl-2-carboxylateHCID 23665647Potassium tert-butoxideHCID 178470390HCID 178470390, compound

Product 1

HCID 10672775Ethyl 1-[(2'-t-butoxycarbonylbiphenyl-4-yl)methyl]-2-ethyl-4-(1-hydroxy-1-methylethyl)imidazole-5-carboxylateYield 89.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 31374DimethylacetamideSolvent

Procedure

0.337 g of potassium t-butoxide was added to a solution of 0.68 g of ethyl 2-ethyl-4-(1-hydroxy-1-methylethyl)imidazole-5-carboxylate (prepared as described in Preparation 37) in 7 ml of N,N-dimethylacetamide, and the resulting mixture was stirred at room temperature for 10 minutes. 1.04 g of t-butyl 4'-bromomethylbiphenyl-2-carboxylate was then added to the resulting solution, and the reaction mixture was stirred at room temperature for 4 hours. At the end of this time, it was mixed with ethyl acetate and water. The ethyl acetate layer was separated, dried over anhydrous magnesium sulfate and concentrated by evaporation under reduced pressure. The residue was purified by column chromatography through silica gel, using a 1:1 by volume mixture of ethyl acetate and hexane as the eluent, to give 1.32 g of the title compound as a gum.

Workup

  1. stirringthe reaction mixture was stirred at room temperature for 4 hours
  2. customThe ethyl acetate layer was separated
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated by evaporation under reduced pressure
  5. customThe residue was purified by column chromatography through silica gel
  6. additionby volume mixture of ethyl acetate and hexane as the eluent

Sources & evidence

ORD record
ord-590b028f915d42a58dff5dc7bafec378
Source dataset
uspto-grants-1997_07
Patent number
US05646171

Reaction notes

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