Oxalyl chloride → HCID 57505505, compound

HRID 1667933Notes

Reaction equation

HRID 1667933 reaction equation
[CH3:1][N:2]1[C:6]([C:7]([OH:9])=O)=[CH:5][CH:4]=[N:3]1.C(Cl)(=O)C(Cl)=O.[NH2:16][C:17]1[CH:18]=[C:19]([CH:36]=[CH:37][CH:38]=1)[O:20][C:21]1[CH:22]=[CH:23][C:24]2[N:25]([CH:27]=[C:28]([NH:30][C:31]([CH:33]3[CH2:35][CH2:34]3)=[O:32])[N:29]=2)[N:26]=1>O1CCCC1.CN(C)C=O.CN(C)C(=O)C.C(=O)([O-])O.[Na+]>[CH:33]1([C:31]([NH:30][C:28]2[N:29]=[C:24]3[CH:23]=[CH:22][C:21]([O:20][C:19]4[CH:18]=[C:17]([NH:16][C:7]([C:6]5[N:2]([CH3:1])[N:3]=[CH:4][CH:5]=5)=[O:9])[CH:38]=[CH:37][CH:36]=4)=[N:26][N:25]3[CH:27]=2)=[O:32])[CH2:34][CH2:35]1

Participants

8

Reactant 3

HCID 65578Oxalyl chlorideHCID 6431581-methyl-1H-pyrazole-5-carboxylic acidHCID 57386059N-[6-(3-aminophenoxy)imidazo[1,2-b]pyridazin-2-yl]cyclopropanecarboxamide

Product 1

HCID 57505505HCID 57505505, compoundYield 89.4%

Reagents, catalysts & solvents 4

HCID 6228DimethylformamideCatalystHCID 8028TetrahydrofuranSolventHCID 31374DimethylacetamideSolventHCID 516892Sodium BicarbonateSolvent

Procedure

To a solution of 1-methyl-1H-pyrazole-5-carboxylic acid (106 mg, 0.840 mmol) in tetrahydrofuran (2.0 mL) were added N,N-dimethylformamide (1 drop) and oxalyl chloride (91 μL, 1.01 mmol), and the mixture was stirred at room temperature for 30 min. The solvent was evaporated under reduced pressure, and the residue was dissolved in N,N-dimethylacetamide (1 mL) and added to a solution of N-[6-(3-aminophenoxy)imidazo[1,2-b]pyridazin-2-yl]cyclopropanecarboxamide (200 mg, 0.646 mmol) in N,N-dimethylacetamide (5.0 mL). The mixture was stirred at room temperature for 30 min. The reaction mixture was diluted with saturated aqueous sodium hydrogencarbonate solution, and extracted three times with ethyl acetate, and the organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and filtrated. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=30/70→95/5) and precipitated from ethyl acetate/hexane to give the title compound (241 mg, 89%) as a white powder.

Workup

  1. customThe solvent was evaporated under reduced pressure
  2. dissolutionthe residue was dissolved in N,N-dimethylacetamide (1 mL)
  3. stirringThe mixture was stirred at room temperature for 30 min
  4. extractionextracted three times with ethyl acetate
  5. washthe organic layer was washed with saturated brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. filtrationfiltrated
  8. customThe solvent was evaporated under reduced pressure
  9. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=30/70→95/5)
  10. customprecipitated from ethyl acetate/hexane

Sources & evidence

ORD record
ord-1b38d244c1ca435fa11d3f89b716f186
Source dataset
uspto-grants-2011_10
Patent number
US08044049B2

Reaction notes

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