Sodium hydride → 1-ethyl-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

HRID 82538Notes

Reaction equation

HRID 82538 reaction equation
Cl[C:2]1[N:6]([CH3:7])[C:5]2[CH:8]=[CH:9][CH:10]=[CH:11][C:4]=2[N:3]=1.[CH2:12]([N:14]1[C:22]2[C:17](=[N:18][CH:19]=[CH:20][CH:21]=2)[N:16]([C:23]2[CH:28]=[CH:27][C:26]([OH:29])=[CH:25][CH:24]=2)[C:15]1=[O:30])[CH3:13].[H-].[Na+]>CN(C=O)C.CO>[CH2:12]([N:14]1[C:22]2[C:17](=[N:18][CH:19]=[CH:20][CH:21]=2)[N:16]([C:23]2[CH:24]=[CH:25][C:26]([O:29][C:2]3[N:6]([CH3:7])[C:5]4[CH:8]=[CH:9][CH:10]=[CH:11][C:4]=4[N:3]=3)=[CH:27][CH:28]=2)[C:15]1=[O:30])[CH3:13]

Participants

6

Reactant 3

HCID 24758Sodium hydrideHCID 6630802-chloro-1-methyl-1H-1,3-benzodiazoleHCID 585777461-ethyl-3-(4-hydroxyphenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

Product 1

HCID 585773641-ethyl-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-oneYield 82.1%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
150 °C

Procedure

2-Chloro-1-methyl-1H-benzimidazole (500 mg) was added to a solution of 1-ethyl-3-(4-hydroxyphenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (789 mg) and NaH (132 mg) in DMF (10 mL) at room temperature. The mixture was heated at 150° C. for 1 h under microwave irradiation. The reaction mixture was diluted with MeOH and concentrated in vacuo. The residue was purified by column chromatography (NH silica gel, eluted with 0%-50% EtOAc in hexane) to give 1-ethyl-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (950 mg) as white crystals.

Workup

  1. concentrationconcentrated in vacuo
  2. customThe residue was purified by column chromatography (NH silica gel, eluted with 0%-50% EtOAc in hexane)

Sources & evidence

ORD record
ord-95e9f1d69ea14094bfb72a6a7e9b049f
Source dataset
uspto-grants-2014_09
Patent number
US08846713B2

Reaction notes

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