Water → HCID 57619279, compound

HRID 1952095Notes

Reaction equation

HRID 1952095 reaction equation
[CH3:1][O:2][C:3]([C:5]1[NH:6][N:7]=[C:8]([N+:10]([O-:12])=[O:11])[CH:9]=1)=[O:4].I[CH2:14][CH3:15].C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[CH3:1][O:2][C:3]([C:5]1[N:6]([CH2:14][CH3:15])[N:7]=[C:8]([N+:10]([O-:12])=[O:11])[CH:9]=1)=[O:4]

Participants

6

Reactant 4

HCID 962WaterHCID 6340IodoethaneHCID 11430Potassium CarbonateHCID 178498471HCID 178498471, compound

Product 1

HCID 57619279HCID 57619279, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To 5-nitro-2H-pyrazole-3-carboxylic acid methyl ester (525, 2.50 g, 0.0146 mol) in N,N-dimethylformamide (62.5 mL) were added iodoethane (1.2 mL, 0.016 mol) and potassium carbonate (4.17 g, 0.0301 mol) under an atmosphere of nitrogen. The reaction was stirred at room temperature overnight. The reaction was poured into water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 20% to 100% ethyl acetate in hexane to give a white solid (526, 1.3 g, 44.7%).

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated
  5. custompurified by silica gel column chromatography
  6. washeluting with 20% to 100% ethyl acetate in hexane
  7. customto give a white solid (526, 1.3 g, 44.7%)

Sources & evidence

ORD record
ord-26fcee7f3556411487bbdf10344934b1
Source dataset
uspto-grants-2013_03
Patent number
US08404700B2

Reaction notes

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