Oxindole → 3-[(3,4-Dimethylpyrrol-2-yl)methylene]-2-indolinone

HRID 1761148Notes

Reaction equation

HRID 1761148 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][C:2]1=[O:10].[CH3:11][C:12]1[C:16]([CH3:17])=[CH:15][NH:14][C:13]=1[CH:18]=O>N1CCCCC1.C(O)C>[CH3:11][C:12]1[C:16]([CH3:17])=[CH:15][NH:14][C:13]=1[CH:18]=[C:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[NH:1][C:2]1=[O:10]

Participants

5

Reactant 2

HCID 321710OxindoleHCID 5796263,4-dimethyl-1H-pyrrole-2-carboxaldehyde

Product 1

HCID 498236243-[(3,4-Dimethylpyrrol-2-yl)methylene]-2-indolinoneYield 73.6%

Reagents, catalysts & solvents 2

HCID 8082PiperidineCatalystHCID 702EthanolSolvent

Conditions

Temperature
90 °C

Procedure

A reaction mixture of 67.0 mg (0.5 mmoles) of oxindole, 73.0 mg (0.6 mmoles) of the 3,4-dimethylpyrrole-2-carboxaldehyde, and 2 drops of piperidine in 2 mL of ethanol was stirred at 90° C. for 3 h. After cooling, the precipitate was filtered, washed with cold ethanol, and dried to yield 87.7 mg (37%) of the title compound as a yellow solid.

Workup

  1. temperatureAfter cooling
  2. filtrationthe precipitate was filtered
  3. washwashed with cold ethanol
  4. customdried

Sources & evidence

ORD record
ord-6ffcc334c96043ee8d4e2ecd24f1b30f
Source dataset
uspto-grants-2005_01
Patent number
US06846839B1

Reaction notes

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