Diisopropylethylamine → Ethyl 4-(2-isopropyl-1H-imidazol-1-yl)-3-nitrobenzoate

HRID 576844Notes

Reaction equation

HRID 576844 reaction equation
F[C:2]1[CH:12]=[CH:11][C:5]([C:6]([O:8][CH2:9][CH3:10])=[O:7])=[CH:4][C:3]=1[N+:13]([O-:15])=[O:14].[CH:16]([C:19]1[NH:20][CH:21]=[CH:22][N:23]=1)([CH3:18])[CH3:17].C(N(CC)C(C)C)(C)C>C(#N)C>[CH:16]([C:19]1[N:20]([C:2]2[CH:12]=[CH:11][C:5]([C:6]([O:8][CH2:9][CH3:10])=[O:7])=[CH:4][C:3]=2[N+:13]([O-:15])=[O:14])[CH:21]=[CH:22][N:23]=1)([CH3:18])[CH3:17]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 1234571H-Imidazole, 2-(1-methylethyl)-HCID 21277355Ethyl 4-fluoro-3-nitrobenzoate

Product 1

HCID 59198553Ethyl 4-(2-isopropyl-1H-imidazol-1-yl)-3-nitrobenzoateYield 81.7%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of ethyl 4-fluoro-3-nitrobenzoate 4.26 g, 2-isopropylimidazole 2.20 g, N,N-diisopropylethylamine 5.2 mL and acetonitrile 40 mL was heated under reflux for 24 hours. After distilling the solvent off, water was added to the residue and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and removed of the solvent by distillation, to provide 4.95 g of the title compound.

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 24 hours
  3. distillationAfter distilling the solvent off, water
  4. additionwas added to the residue
  5. extractionextracted with ethyl acetate
  6. washThe organic layer was washed with brine
  7. dry with materialdried over magnesium sulfate
  8. customremoved of the solvent by distillation

Sources & evidence

ORD record
ord-e06bb3fbe39a4bfc8f38d997d37121b5
Source dataset
uspto-grants-2015_05
Patent number
US09040536B2

Reaction notes

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