Methanol → N-[3-({2-[(methoxyacetyl)amino]imidazo[1,2-a]pyridin-6-yl}oxy)phenyl]-3-methylpyridine-2-carboxamide

HRID 1874544Notes

Reaction equation

HRID 1874544 reaction equation
[NH2:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][C:7]([O:10][C:11]3[CH:12]=[C:13]([NH:17][C:18]([C:20]4[C:25]([CH3:26])=[CH:24][CH:23]=[CH:22][N:21]=4)=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:6][N:5]2[CH:27]=1.[CH3:28][O:29][CH2:30][C:31](Cl)=[O:32].CO.C(=O)([O-])[O-].[Na+].[Na+]>CN(C)C(=O)C.O1CCCC1>[CH3:28][O:29][CH2:30][C:31]([NH:1][C:2]1[N:3]=[C:4]2[CH:9]=[CH:8][C:7]([O:10][C:11]3[CH:12]=[C:13]([NH:17][C:18]([C:20]4[C:25]([CH3:26])=[CH:24][CH:23]=[CH:22][N:21]=4)=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:6][N:5]2[CH:27]=1)=[O:32]

Participants

7

Reactant 4

HCID 887MethanolHCID 10340Sodium CarbonateHCID 96623Methoxyacetyl chlorideHCID 57749390N-{3-[(2-aminoimidazo[1,2-a]pyridin-6-yl)oxy]phenyl}-3-methylpyridine-2-carboxamide

Product 1

HCID 57749206N-[3-({2-[(methoxyacetyl)amino]imidazo[1,2-a]pyridin-6-yl}oxy)phenyl]-3-methylpyridine-2-carboxamideYield 23%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 31374DimethylacetamideSolvent

Procedure

To a solution of N-{3-[(2-aminoimidazo[1,2-a]pyridin-6-yl)oxy]phenyl}-3-methylpyridine-2-carboxamide (148 mg, 0.412 mmol) in N,N-dimethylacetamide (5 mL) was added methoxyacetyl chloride (37.8 μL, 0.413 mmol), and the mixture was stirred at room temperature for 81 hr. Methanol, tetrahydrofuran and aqueous sodium carbonate solution were added to the reaction mixture, and the mixture was stirred at 60° C. for 8 hr. The reaction mixture was concentrated under reduced pressure, diluted with aqueous sodium hydrogen carbonate solution and extracted with ethyl acetate. The organic layer was washed with aqueous sodium hydrogen carbonate solution and saturated brine, dried over anhydrous magnesium sulfate and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (0%→90% ethyl acetate-hexane) to give the title compound (40.6 mg, 23%) as a pale-yellow solid.

Workup

  1. stirringthe mixture was stirred at 60° C. for 8 hr
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. additiondiluted with aqueous sodium hydrogen carbonate solution
  4. extractionextracted with ethyl acetate
  5. washThe organic layer was washed with aqueous sodium hydrogen carbonate solution and saturated brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltrated
  8. concentrationThe filtrate was concentrated under reduced pressure
  9. customthe residue was purified by silica gel column chromatography (0%→90% ethyl acetate-hexane)

Sources & evidence

ORD record
ord-8c596bfe6a9f46b38e29d2d454026b48
Source dataset
uspto-grants-2012_11
Patent number
US08304557B2

Reaction notes

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