Tributylphosphine → 1-(2-Cyclopropyl-3-methylimidazo[1,2-a]pyridin-6-yl)-4-((3-fluorobenzyl)oxy)pyridin-2(1H)-one

HRID 2202953Notes

Reaction equation

[CH:1]1([C:4]2[N:5]=[C:6]3[CH:11]=[CH:10][C:9]([N:12]4[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]4=[O:19])=[CH:8][N:7]3[C:20]=2[CH3:21])[CH2:3][CH2:2]1.[F:22][C:23]1[CH:24]=[C:25]([CH2:29]O)[CH:26]=[CH:27][CH:28]=1.C(P(CCCC)CCCC)CCC.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O>C1COCC1>[CH:1]1([C:4]2[N:5]=[C:6]3[CH:11]=[CH:10][C:9]([N:12]4[CH:17]=[CH:16][C:15]([O:18][CH2:29][C:25]5[CH:26]=[CH:27][CH:28]=[C:23]([F:22])[CH:24]=5)=[CH:14][C:13]4=[O:19])=[CH:8][N:7]3[C:20]=2[CH3:21])[CH2:3][CH2:2]1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of 1-(2-cyclopropyl-3-methylimidazo[1,2-a]pyridin-6-yl)-4-hydroxypyridin-2(1H)-one (150 mg), (3-fluorophenyl)-methanol (134 mg) and tributylphosphine (322 mg) in THF (15 ml) was added 1,1′-(azodicarbonyl)dipiperidine (401 mg). The mixture was stirred under sonication at 60° C. for 4 h. The reaction mixture was then cooled to room temperature and concentrated in vacuo. The residue was diluted with DCM (100 ml), and the DCM layer was washed with water and brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by silica gel column chromatography (MeOH/DCM) to give the title compound (45 mg) as a white solid.

Workup

temperatureThe reaction mixture was then cooled to room temperature
concentrationconcentrated in vacuo
additionThe residue was diluted with DCM (100 ml)
washthe DCM layer was washed with water and brine
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo
customThe residue was purified by silica gel column chromatography (MeOH/DCM)

Sources & evidence

ORD record: ord-384689d7c9e7490b994636fbf0e5a378
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09365540B2

Reaction notes

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