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

HRID 82590Notes

Reaction equation

[CH3:1][N:2]1[C:6]2=[N:7][CH:8]=[CH:9][CH:10]=[C:5]2[N:4]=[C:3]1S(C)(=O)=O.[OH:15][C:16]1[CH:21]=[CH:20][C:19]([N:22]2[C:26]3=[N:27][CH:28]=[CH:29][CH:30]=[C:25]3[N:24]([CH2:31][CH2:32][CH3:33])[C:23]2=[O:34])=[CH:18][CH:17]=1.[H-].[Na+]>CN(C=O)C.CO>[CH3:1][N:2]1[C:6]2=[N:7][CH:8]=[CH:9][CH:10]=[C:5]2[N:4]=[C:3]1[O:15][C:16]1[CH:17]=[CH:18][C:19]([N:22]2[C:26]3=[N:27][CH:28]=[CH:29][CH:30]=[C:25]3[N:24]([CH2:31][CH2:32][CH3:33])[C:23]2=[O:34])=[CH:20][CH:21]=1

Participants

Conditions

Temperature: 180 °C

Procedure

3-Methyl-2-(methylsulfonyl)-3H-imidazo[4,5-b]pyridine (320 mg) was added to a solution of 3-(4-hydroxyphenyl)-1-propyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (400 mg) and NaH (65.3 mg) in DMF (5 ml) at 100° C.,. 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%-50% EtOAc in hexane) to give 3-{4-[(3-methyl-3H-imidazo[4,5-b]pyridin-2-yl)oxy]phenyl}-1-propyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (300 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-6f6de0014bb14de29fd89fea2302903b
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846713B2

Reaction notes

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