Phthalic Anhydride → N-Methyl-N-[(1-methyl-2-indolyl)methyl]acrylamide

HRID 1761122Notes

Reaction equation

HRID 1761122 reaction equation
C1(=O)OC(=O)C2=CC=CC=C12.NC1N=CC(/[CH:19]=[CH:20]/[C:21]([N:23]([CH3:35])[CH2:24][C:25]2[N:26]([CH3:34])[C:27]3[C:32]([CH:33]=2)=[CH:31][CH:30]=[CH:29][CH:28]=3)=[O:22])=CC=1.C(=O)(O)[O-].[Na+]>C1COCC1>[CH3:35][N:23]([CH2:24][C:25]1[N:26]([CH3:34])[C:27]2[C:32]([CH:33]=1)=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:21](=[O:22])[CH:20]=[CH2:19]

Participants

5

Reactant 3

HCID 6811Phthalic AnhydrideHCID 516892Sodium BicarbonateHCID 52877203-(6-Aminopyridin-3-Yl)-N-Methyl-N-((1-Methyl-1h-Indol-2-Yl)Methyl)Acrylamide

Product 1

HCID 20752825N-Methyl-N-[(1-methyl-2-indolyl)methyl]acrylamideYield 32%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Phthalic anhydride (0.81 g, 5.48 mmole) was added to a solution of (E)-3-(6-aminopyridin-3-yl)-N-methyl-N-(1-methyl-1H-indol-2-ylmethyl)acrylamide (0.44 g, 1.37 mmole) and sodium bicarbonate (0.58 g, 6.85 mmole) in THF (70 mL) at RT, and the reaction was heated at reflux under nitrogen. After 48 hr, the reaction was concentrated in vacuo and the residue was diluted with water and extracted with ethyl acetate. The combined extracts were dried over Na2SO4 and concentrated. Flash chromatography on silica gel (10% MeOH/CHCl3) gave the title compound (0.10 g, 16%) as a light yellow solid: MS (ES) m/e 469 (M+H)+.

Workup

  1. temperaturethe reaction was heated
  2. temperatureat reflux under nitrogen
  3. concentrationthe reaction was concentrated in vacuo
  4. additionthe residue was diluted with water
  5. extractionextracted with ethyl acetate
  6. dry with materialThe combined extracts were dried over Na2SO4
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-0a1b93e315194725a883fa7f85ee4894
Source dataset
uspto-grants-2005_01
Patent number
US06846819B1

Reaction notes

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