Dimethylformamide → 3-[4-(benzyloxy)phenyl]-6-(difluoromethoxy)-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

HRID 82658Notes

Reaction equation

HRID 82658 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([N:15]2[C:19]3=[N:20][CH:21]=[C:22]([OH:24])[CH:23]=[C:18]3[N:17]([CH2:25][CH3:26])[C:16]2=[O:27])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl[C:29]([F:34])([F:33])C([O-])=O.[Na+].C([O-])([O-])=O.[K+].[K+].CN(C=O)C>O>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([N:15]2[C:19]3=[N:20][CH:21]=[C:22]([O:24][CH:29]([F:34])[F:33])[CH:23]=[C:18]3[N:17]([CH2:25][CH3:26])[C:16]2=[O:27])=[CH:13][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 2734985Sodium chlorodifluoroacetateHCID 585776213-[4-(benzyloxy)phenyl]-1-ethyl-6-hydroxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one

Product 1

HCID 585774163-[4-(benzyloxy)phenyl]-6-(difluoromethoxy)-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-oneYield 32.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A mixture of 3-[4-(benzyloxy)phenyl]-1-ethyl-6-hydroxy-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (300 mg), sodium chlorodifluoroacetate (253 mg), K2CO3 (172 mg), DMF (3 ml), and water (0.60 ml) was refluxed overnight. The reaction mixture was poured into water, and the mixture was extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, eluted with 10%-40% AcOEt in hexane) to give 3-[4-(benzyloxy)phenyl]-6-(difluoromethoxy)-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (110 mg) as a pale yellow oil.

Workup

  1. temperaturewas refluxed overnight
  2. extractionthe mixture was extracted with AcOEt
  3. washThe extract was washed with brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by column chromatography (silica gel, eluted with 10%-40% AcOEt in hexane)

Sources & evidence

ORD record
ord-d26f07615fee43c8a9b176fd8f08e4c9
Source dataset
uspto-grants-2014_09
Patent number
US08846713B2

Reaction notes

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