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

HRID 587517Notes

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.[F:12][CH:13]([F:31])[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].[H-].[Na+]>CN(C=O)C.CO>[F:31][CH:13]([F: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]([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:25][CH:24]=2)[C:15]1=[O:30]

Participants

Conditions

Temperature: 180 °C

Procedure

2-Chloro-1-methyl-1H-benzimidazole (70 mg) was added to a solution of 1-(difluoromethyl)-3-(4-hydroxyphenyl)-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (122 mg) and NaH (25.2 mg) in DMF (3 mL) at 100° C. The mixture was heated at 180° 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-(difluoromethyl)-3-{4-[(1-methyl-1H-benzimidazol-2-yl)oxy]phenyl}-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (80 mg) as white crystals.

Workup

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

Sources & evidence

ORD record: ord-dccd11d7387742b880bdc236dc2c0cf2
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09226921B2

Reaction notes

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