3-(5-formyl-2,4-dimethyl-1H-pyrrol-3-yl)propanoic Acid → 3-[5-(6-Methoxy-2-oxo-1,2-dihydroindol-3-ylidenemethyl)-2,4-dimethyl-1H-pyrrol-3-yl]-propionic acid

HRID 1815397Notes

Reaction equation

HRID 1815397 reaction equation
[C:1]([CH2:4][CH2:5][C:6]1[C:10]([CH3:11])=[C:9]([CH:12]=O)[NH:8][C:7]=1[CH3:14])([OH:3])=[O:2].[CH3:15][O:16][C:17]1[CH:25]=[C:24]2[C:20]([CH2:21][C:22](=[O:26])[NH:23]2)=[CH:19][CH:18]=1>N1CCCCC1.C(O)C>[CH3:15][O:16][C:17]1[CH:25]=[C:24]2[C:20]([C:21](=[CH:12][C:9]3[NH:8][C:7]([CH3:14])=[C:6]([CH2:5][CH2:4][C:1]([OH:3])=[O:2])[C:10]=3[CH3:11])[C:22](=[O:26])[NH:23]2)=[CH:19][CH:18]=1

Participants

5

Reactant 2

HCID 15125203-(5-formyl-2,4-dimethyl-1H-pyrrol-3-yl)propanoic AcidHCID 27937496-Methoxyoxindole

Product 1

HCID 572885353-[5-(6-Methoxy-2-oxo-1,2-dihydroindol-3-ylidenemethyl)-2,4-dimethyl-1H-pyrrol-3-yl]-propionic acidYield 76.5%

Reagents, catalysts & solvents 2

HCID 8082PiperidineCatalystHCID 702EthanolSolvent

Procedure

3-(2-carboxyethyl)-2,4-dimethyl-5-formylpyrrole (97.5 mg), 82 mg 6-methoxy-2-oxindole and 2 drops piperidine in 2 mL of ethanol were heated at 95° C. for overnight. The reaction mixture was cooled and concentrated. The residue was suspended in 2 N aqueous hydrochloric acid. The precipitate was filtered, washed with water to pH 6 and dried in a vacuum oven overnight to give 130 mg (76%) of the title compound as a yellow solid.

Workup

  1. temperatureThe reaction mixture was cooled
  2. concentrationconcentrated
  3. filtrationThe precipitate was filtered
  4. washwashed with water to pH 6
  5. customdried in a vacuum oven overnight

Sources & evidence

ORD record
ord-c9e34c46ab7c4ae3a70d9f547c94aba6
Source dataset
uspto-grants-2005_04
Patent number
US06878733B1

Reaction notes

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