Acetyl chloride → N-(3-{[2-(acetylamino)imidazo[1,2-a]pyridin-6-yl]oxy}phenyl)-6-methylpyridine-2-carboxamide

HRID 1874553Notes

Reaction equation

HRID 1874553 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[CH:25]=[CH:24][CH:23]=[C:22]([CH3:26])[N:21]=4)=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:6][N:5]2[CH:27]=1.[C:28](Cl)(=[O:30])[CH3:29]>CN(C)C(=O)C.C(=O)([O-])O.[Na+]>[C:28]([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[CH:25]=[CH:24][CH:23]=[C:22]([CH3:26])[N:21]=4)=[O:19])[CH:14]=[CH:15][CH:16]=3)=[CH:6][N:5]2[CH:27]=1)(=[O:30])[CH3:29]

Participants

5

Reactant 2

HCID 6367Acetyl chlorideHCID 57749229N-{3-[(2-aminoimidazo[1,2-a]pyridin-6-yl)oxy]phenyl}-6-methylpyridine-2-carboxamide

Product 1

HCID 57749351N-(3-{[2-(acetylamino)imidazo[1,2-a]pyridin-6-yl]oxy}phenyl)-6-methylpyridine-2-carboxamideYield 33%

Reagents, catalysts & solvents 2

HCID 31374DimethylacetamideSolventHCID 516892Sodium BicarbonateSolvent

Procedure

To a solution of N-{3-[(2-aminoimidazo[1,2-a]pyridin-6-yl)oxy]phenyl}-6-methylpyridine-2-carboxamide (300 mg, 0.835 mmol) in N,N-dimethylacetamide (5 mL) was added acetyl chloride (59.4 μL, 0.835 mmol), and the mixture was stirred at room temperature for 11 hr. The reaction mixture was 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 (NH silica gel, 0%→100% ethyl acetate-hexane) to give the title compound (109 mg, 33%) as a pale-yellow solid.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with aqueous sodium hydrogen carbonate solution and saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltrated
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe residue was purified by silica gel column chromatography (NH silica gel, 0%→100% ethyl acetate-hexane)

Sources & evidence

ORD record
ord-2fd56ecbbc4742c6a6ebe69db4826c6b
Source dataset
uspto-grants-2012_11
Patent number
US08304557B2

Reaction notes

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