Potassium Carbonate → 1h-Pyrazole-3-carboxamide,4-iodo-1-[(4-methoxyphenyl)methyl]-n-phenyl-

HRID 1169926Notes

Reaction equation

HRID 1169926 reaction equation
[C:1]1([NH:7][C:8]([C:10]2[C:14]([I:15])=[CH:13][NH:12][N:11]=2)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(=O)([O-])[O-].[K+].[K+].[CH3:22][O:23][C:24]1[CH:31]=[CH:30][C:27]([CH2:28]Cl)=[CH:26][CH:25]=1>C(#N)C>[C:1]1([NH:7][C:8]([C:10]2[C:14]([I:15])=[CH:13][N:12]([CH2:28][C:27]3[CH:30]=[CH:31][C:24]([O:23][CH3:22])=[CH:25][CH:26]=3)[N:11]=2)=[O:9])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 699934-Methyloxybenzyl chlorideHCID 178521931HCID 178521931, compound

Product 1

HCID 668573141h-Pyrazole-3-carboxamide,4-iodo-1-[(4-methoxyphenyl)methyl]-n-phenyl-Yield 71.2%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A solution of 4-iodo-1H-pyrazole-3-carboxylic acid phenylamide (670 mg; 2.14 mmol) in acetonitrile (10 ml) was treated with potassium carbonate (360 mg; 2.57 mmol)) followed by 4-methoxybenzyl chloride (320 μl; 2.35 mmol). The mixture was stirred at room temperature overnight then evaporated under reduced pressure. The residue was partitioned between ethyl acetate and brine; the ethyl acetate layer was separated, dried (MgSO4), filtered and evaporated. The crude material was purified by flash column chromatography eluting with 1:3 ethyl acetate/hexane and the product containing fractions combined and evaporated to give 660 mg of 4-iodo-1-(4-methoxy-benzyl)-1H-pyrazole-3-carboxylic acid phenylamide.

Workup

  1. customthen evaporated under reduced pressure
  2. customThe residue was partitioned between ethyl acetate and brine
  3. customthe ethyl acetate layer was separated
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. customevaporated
  7. customThe crude material was purified by flash column chromatography
  8. washeluting with 1:3 ethyl acetate/hexane
  9. additionthe product containing fractions
  10. customevaporated

Sources & evidence

ORD record
ord-ce6fcad02b6945bfb8cea8e54fc611cb
Source dataset
uspto-grants-2010_11
Patent number
US07825140B2

Reaction notes

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