Sodium hydride → 1-ethyl-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridine-6-carbonitrile

HRID 1044233Notes

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]=[C:20]([C:23]#[N:24])[CH:21]=2)[N:16]([C:25]2[CH:30]=[CH:29][C:28]([OH:31])=[CH:27][CH:26]=2)[C:15]1=[O:32])[CH3:13].[H-].[Na+]>CN(C=O)C.CO>[CH2:12]([N:14]1[C:22]2[C:17](=[N:18][CH:19]=[C:20]([C:23]#[N:24])[CH:21]=2)[N:16]([C:25]2[CH:30]=[CH:29][C:28]([O:31][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:26]=2)[C:15]1=[O:32])[CH3:13]

Participants

Conditions

Temperature: 180 °C

Procedure

2-Chloro-1-methyl-1H-benzimidazole (15 mg) was added to a solution of 1-ethyl-3-(4-hydroxyphenyl)-2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridine-6-carbonitrile (25.5 mg) and sodium hydride (4.0 mg) in DMF (1.0 mL) at room temperature. The mixture was heated at 180° C. for 30 min 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%-30% EtOAc in hexane) to give 1-ethyl-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridine-6-carbonitrile (5 mg) as white crystals.

Workup

concentrationconcentrated in vacuo
customThe residue was purified by column chromatography (NH silica gel, eluted with 0%-30% EtOAc in hexane)

Sources & evidence

ORD record: ord-972e03bb1995417c9b7fdb512dccdf47
Source dataset: uspto-grants-2013_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08563575B2

Reaction notes

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