Acetic Acid → 3-[2-(6-chloro-2-oxo-1,2-dihydroindol-3-ylidenemethyl)-4,5,6,7-tetrahydro-1H-indol-3-yl]-propionic acid

HRID 24506

Reaction equation

HRID 24506 reaction equation
[CH:1]([C:3]1[NH:4][C:5]2[CH2:6][CH2:7][CH2:8][CH2:9][C:10]=2[C:11]=1[CH2:12][CH2:13][C:14]([OH:16])=[O:15])=O.[Cl:17][C:18]1[CH:26]=[C:25]2[C:21]([CH2:22][C:23](=[O:27])[NH:24]2)=[CH:20][CH:19]=1.N1CCCCC1.C(O)(=O)C>C(O)C>[Cl:17][C:18]1[CH:26]=[C:25]2[C:21]([C:22](=[CH:1][C:3]3[NH:4][C:5]4[CH2:6][CH2:7][CH2:8][CH2:9][C:10]=4[C:11]=3[CH2:12][CH2:13][C:14]([OH:16])=[O:15])[C:23](=[O:27])[NH:24]2)=[CH:20][CH:19]=1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 8082PiperidineHCID 7363446-Chloro-1,3-dihydroindol-2-oneHCID 106090023-(2-formyl-4,5,6,7-tetrahydro-1H-indol-3-yl)propionic acid

Product 1

HCID 697647143-[2-(6-chloro-2-oxo-1,2-dihydroindol-3-ylidenemethyl)-4,5,6,7-tetrahydro-1H-indol-3-yl]-propionic acidYield 80%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 3-(2-formyl-4,5,6,7-tetrahydro-1H-indol-3-yl)-propionic acid (5.4 g), 3.7 g of 6-chloro-2-oxindole and 2.7 g of piperidine in 25 mL of ethanol was refluxed for 4 hours. Upon slow addition of acetic acid (8 mL), a precipitate formed. The mixture was refluxed for 5 minutes and cooled to ambient temperature. The precipitate was collected by vacuum filtration and washed with 20 mL of ethanol. The solids were slurry-washed in 30 mL of reflushing ethanol, cooled, collected by vacuum filtration, washed with 30 mL of ethanol and vacuum dried to give 6.5 g (80%) of 3-[2-(6-chloro-2-oxo-1,2-dihydroindol-3-ylidenemethyl)-4,5,6,7-tetrahydro-1H-indol-3-yl]-propionic acid as an orange solid.

Workup

  1. temperaturewas refluxed for 4 hours
  2. customa precipitate formed
  3. temperatureThe mixture was refluxed for 5 minutes
  4. filtrationThe precipitate was collected by vacuum filtration
  5. washwashed with 20 mL of ethanol
  6. washThe solids were slurry-washed in 30 mL of reflushing ethanol
  7. temperaturecooled
  8. filtrationcollected by vacuum filtration
  9. washwashed with 30 mL of ethanol and vacuum
  10. customdried

Sources & evidence

ORD record
ord-4c9236b9bd0943d099410845a075f718
Source dataset
uspto-grants-2005_02
Patent number
US06855730B2

Linked notes

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