1,2-Dimethoxyethane → 2H-Indol-2-one, 5-(4-ethenyl-3-pyridinyl)-1,3-dihydro-1-methyl-

HRID 1623501Notes

Reaction equation

HRID 1623501 reaction equation
[CH3:1][N:2]1[C:10]2[C:5](=[CH:6][C:7](B3OC(C)(C)C(C)(C)O3)=[CH:8][CH:9]=2)[CH2:4][C:3]1=[O:20].Br[C:22]1[CH:23]=[N:24][CH:25]=[CH:26][C:27]=1[CH:28]=[CH2:29].COCCOC.C(=O)([O-])[O-].[Na+].[Na+]>ClCCl.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:1][N:2]1[C:10]2[C:5](=[CH:6][C:7]([C:22]3[CH:23]=[N:24][CH:25]=[CH:26][C:27]=3[CH:28]=[CH2:29])=[CH:8][CH:9]=2)[CH2:4][C:3]1=[O:20]

Participants

7

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 585476651-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,3-dihydro-2H-indol-2-oneHCID 667936541255957-49-3

Product 1

HCID 667939262H-Indol-2-one, 5-(4-ethenyl-3-pyridinyl)-1,3-dihydro-1-methyl-

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6344DichloromethaneSolvent

Conditions

Temperature
115 °C

Procedure

To 1-methyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1,3-dihydro-indol-2-one (135 mg, 0.49 mmol), prepared as described in Example 3a, was added 3-bromo-4-vinyl-pyridine (100 mg, 0.54 mmol), 1,2-dimethoxyethane (3.0 mL), and 2 M aqueous sodium carbonate (0.560 mL, 1.1 mmol). The reaction mixture was degassed and placed under an argon atmosphere, at which time resin bound tetrakis(triphenylphosphine)palladium(0), specifically polystyrene triphenylphosphine palladium (0) [PS—PPh3-Pd(0) (Biotage), 0.11 mmol/g loading, (225 mg, 0.025 mmol)] was added. The reaction vessel was sealed and was heated by microwave irradiation at 115° C. for 4 hours. The reaction mixture was cooled to room temperature, diluted with dichloromethane and filtered through glass wool. The filtrate was further diluted with saturated aqueous sodium bicarbonate and the layers were separated. The aqueous layer was extracted two times with dichloromethane, and the organic layers were combined, dried over anhydrous sodium sulfate, filtered and concentrated. The resulting residue was purified by silica gel flash chromatography (ethanol-dichloromethane, 0 to 6%) to furnish 1-methyl-5-(4-vinyl-pyridin-3-yl)-1,3-dihydro-indol-2-one; MS: (ES+) m/z 251.3 (M+H)+.

Workup

  1. customThe reaction mixture was degassed
  2. additionwas added
  3. customThe reaction vessel was sealed
  4. temperatureThe reaction mixture was cooled to room temperature
  5. filtrationfiltered through glass wool
  6. additionThe filtrate was further diluted with saturated aqueous sodium bicarbonate
  7. customthe layers were separated
  8. extractionThe aqueous layer was extracted two times with dichloromethane
  9. dry with materialdried over anhydrous sodium sulfate
  10. filtrationfiltered
  11. concentrationconcentrated
  12. customThe resulting residue was purified by silica gel flash chromatography (ethanol-dichloromethane, 0 to 6%)

Sources & evidence

ORD record
ord-a661512b7661441d8091a9895b9a1944
Source dataset
uspto-grants-2014_07
Patent number
US08778972B2

Reaction notes

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