Piperidine → HCID 57231128, compound

HRID 1937567Notes

Reaction equation

HRID 1937567 reaction equation
[C:1]([CH2:4][CH2:5][C:6]1[C:7]([CH3:13])=[C:8]([CH:11]=O)[NH:9][CH:10]=1)([OH:3])=[O:2].[CH2:14]([C:16]1[CH:17]=[C:18]2[C:22](=[CH:23][CH:24]=1)[NH:21][C:20](=[O:25])[CH2:19]2)[CH3:15].N1CCCCC1>C(O)C>[CH2:14]([C:16]1[CH:17]=[C:18]2[C:22](=[CH:23][CH:24]=1)[NH:21][C:20](=[O:25])[C:19]2=[CH:11][C:8]1[NH:9][CH:10]=[C:6]([CH2:5][CH2:4][C:1]([OH:3])=[O:2])[C:7]=1[CH3:13])[CH3:15]

Participants

5

Reactant 3

HCID 8082PiperidineHCID 101541895-Ethyl-1,3-dihydro-2H-indol-2-oneHCID 151607523-(5-formyl-4-methyl-1H-pyrrol-3-yl)propanoic acid

Product 1

HCID 57231128HCID 57231128, compoundYield 32.1%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

4-(2-Carboxyethyl)-2-formyl-3-methylpyrrole (90.6 mg), 80.5 mg 5-ethyl-2-oxindole, and 75 μL of piperidine in 2 mL of ethanol were heated at 95° C. for 5 hours. The reaction mixture was cooled and concentrated. The residue was suspended in 6 N of aqueous hydrochloric acid. The precipitate was filtered, washed with water to pH 6 and dried in a vacuum oven overnight. The crude solid was purified by a chromatography on a silica gel column eluting with ethyl acetate-hexane-acetic acid to give 52 mg (32%) of the title compound.

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
  6. customThe crude solid was purified by a chromatography on a silica gel column
  7. washeluting with ethyl acetate-hexane-acetic acid

Sources & evidence

ORD record
ord-3b7e87159d4248c1ada1d748539470f6
Source dataset
uspto-grants-2002_05
Patent number
US06395734B1

Reaction notes

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