1,2-Dimethoxyethane → HCID 66788116, compound

HRID 1623525Notes

Reaction equation

HRID 1623525 reaction equation
[Cl:1][C:2]1[C:10](B2OC(C)(C)C(C)(C)O2)=[CH:9][CH:8]=[C:7]2[C:3]=1[CH2:4][C:5](=[O:21])[N:6]2[CH3:20].Br[C:23]1[CH:24]=[N:25][CH:26]=[C:27]([O:29][CH2:30][CH3:31])[CH:28]=1.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>[Cl:1][C:2]1[C:10]([C:23]2[CH:24]=[N:25][CH:26]=[C:27]([O:29][CH2:30][CH3:31])[CH:28]=2)=[CH:9][CH:8]=[C:7]2[C:3]=1[CH2:4][C:5](=[O:21])[N:6]2[CH3:20]

Participants

7

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 122934803-Bromo-5-ethoxypyridineHCID 66788224HCID 66788224, compound

Product 1

HCID 66788116HCID 66788116, compound

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6344DichloromethaneSolvent

Conditions

Temperature
115 °C

Procedure

To 4-chloro-1-methyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1,3-dihydro-indol-2-one (95 mg, 0.31 mmol) was added 3-bromo-5-ethoxy-pyridine (CAS#17117-17-8, 69 mg, 0.34 mmol), 1,2-dimethoxyethane (3.0 mL), and 2 M aqueous sodium carbonate (0.390 mL, 0.77 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, (140 mg, 0.015 mmol)] was added. The reaction vessel was sealed and was heated by microwave irradiation at 115° C. for 3 hours. The reaction mixture was then 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 3%) to furnish 4-chloro-5-(5-ethoxy-pyridin-3-yl)-1-methyl-1,3-dihydro-indol-2-one; HRMS: (ESI) m/z 303.0901 (M+H)1; 1H NMR (400 MHz, CDCl3) δ ppm 1.48 (t, J=6.9 Hz, 3H), 3.26 (a, 3H), 3.61 (a, 2H), 4.15 (q, J=6.9 Hz, 2H), 6.84 (d, J=8.1 Hz, 1H), 7.28-7.33 (m, 2H), 8.26 (d, J=1.8 Hz, 1H), 8.32 (d, J=2.8 Hz, 1H).

Workup

  1. customThe reaction mixture was degassed
  2. additionwas added
  3. customThe reaction vessel was sealed
  4. temperatureThe reaction mixture was then 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 3%)

Sources & evidence

ORD record
ord-82f0ae0d53df4dbcb3a0f8e87c5529f3
Source dataset
uspto-grants-2014_07
Patent number
US08778972B2

Reaction notes

Loading…