Hydrochloric Acid → Ethyl 2-(5-benzoyl-1,4-dimethylpyrrol-2-yl)-2-(2-fluoro-4-aminophenyl)acetate

HRID 369380Notes

Reaction equation

HRID 369380 reaction equation
[C:1]([C:9]1[N:13]([CH3:14])[C:12]([CH:15]([C:21]2[CH:26]=[CH:25][C:24]([N+:27]([O-])=O)=[CH:23][C:22]=2[F:30])[C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:11][C:10]=1[CH3:31])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl>B#[Ni].CO>[C:1]([C:9]1[N:13]([CH3:14])[C:12]([CH:15]([C:21]2[CH:26]=[CH:25][C:24]([NH2:27])=[CH:23][C:22]=2[F:30])[C:16]([O:18][CH2:19][CH3:20])=[O:17])=[CH:11][C:10]=1[CH3:31])(=[O:8])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 313Hydrochloric AcidHCID 15870183Ethyl 2-(5-benzoyl-1,4-dimethylpyrrol-2-yl)-2-(2-fluoro-4-nitrophenyl)acetate

Product 1

HCID 15870184Ethyl 2-(5-benzoyl-1,4-dimethylpyrrol-2-yl)-2-(2-fluoro-4-aminophenyl)acetateYield 95.3%

Reagents, catalysts & solvents 2

HCID 82791nickel boride (NiB)CatalystHCID 887MethanolSolvent

Procedure

A mixture of ethyl 2-(5-benzoyl-1,4-dimethylpyrrol-2-yl)-2-(2-fluoro-4-nitrophenyl)-acetate (6.0 g, 14.1 mmol) [prepared as in Example 1, Step (b)], nickel boride (8.0 g, 62.4 mmol), hydrochloric acid (50 ml, 1M) and methanol (150 ml) was heated at reflux for 1 h. The reaction mixture was cooled and filtered through Celite®. After removing the methanol in vacuo, the resulting aqueous mixture was made basic with ammonium hydroxide, and the product was extracted into ethyl acetate. The organic layer was washed with brine and dried over sodium sulfate. Evaporation of the organic layer gave ethyl 2-(5-benzoyl-1,4-dimethyl-pyrrol-2-yl)-2-(2-fluoro-4-aminophenyl)acetate (5.3 g, 95%). ##STR21##

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 1 h
  3. temperatureThe reaction mixture was cooled
  4. filtrationfiltered through Celite®
  5. customAfter removing the methanol in vacuo
  6. extractionthe product was extracted into ethyl acetate
  7. washThe organic layer was washed with brine
  8. dry with materialdried over sodium sulfate
  9. customEvaporation of the organic layer

Sources & evidence

ORD record
ord-7df2780420be46d4b4a2359538392995
Source dataset
uspto-grants-2000_10
Patent number
US06136844

Reaction notes

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