Water → 1-Ethyl-3-{5-[(3-methyl-3H-imidazo[4,5-b]pyridin-2-yl)oxy]pyridin-2-yl}-1H-pyrazolo[4,3-b]pyridine

HRID 573326Notes

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

Participants

Conditions

Temperature: 100 °C

Procedure

To a mixture of 3-methyl-2-(methylsulfonyl)-3H-imidazo[4,5-b]pyridine (90 mg) and 6-(1-ethyl-1H-pyrazolo[4,3-b]pyridin-3-yl)pyridin-3-ol (68 mg) in DMF (1 mL) was added NaH (60% in oil, 18.11 mg), and the mixture was stirred at 100° C. for 1 h. The mixture was heated at 180° C. for 30 min under microwave irradiation. The mixture was poured into water and extracted with AcOEt. The organic layer was separated, washed with brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (AcOEt/hexane). The eluent was evaporated and the residue was crystallized from EtOH/hexane to give the title compound (38.1 mg).

Workup

temperatureThe mixture was heated at 180° C. for 30 min under microwave irradiation
extractionextracted with AcOEt
customThe organic layer was separated
washwashed with brine
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure
customThe residue was purified by basic silica gel column chromatography (AcOEt/hexane)
customThe eluent was evaporated
customthe residue was crystallized from EtOH/hexane

Sources & evidence

ORD record: ord-af457ea6be4b47148d654058b1651c55
Source dataset: uspto-grants-2015_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09029536B2

Reaction notes

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