Potassium Carbonate → HCID 16751730, compound

HRID 1394403Notes

Reaction equation

HRID 1394403 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([CH3:13])([CH3:12])[C:9](=[O:11])[N:10]=2)[CH:7]=1.[Cl:14][C:15]1[CH:16]=[C:17](B(O)O)[CH:18]=[CH:19][CH:20]=1.C(=O)([O-])[O-].[K+].[K+].O1CCOCC1>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.O>[Cl:14][C:15]1[CH:20]=[C:19]([C:2]2[CH:3]=[CH:4][C:5]3[N:6]([C:8]([CH3:13])([CH3:12])[C:9](=[O:11])[N:10]=3)[CH:7]=2)[CH:18]=[CH:17][CH:16]=1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 2734323(3-Chlorophenyl)boronic acidHCID 16751727HCID 16751727, compound

Product 1

HCID 16751730HCID 16751730, compoundYield 63.1%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Procedure

To a round-bottom flask was added 6-bromo-3,3-dimethyl-imidazo[1,2-a]pyridin-2-one (60 mg, 0.25 mmol), 3-chlorophenylboronic acid (39 mg, 0.25 mmol), potassium carbonate (69 mg, 0.25 mmol), Pd(PPh3)4 (29 mg, 0.025 mmol), dioxane (5 mL) and water (1 mL). The mixture was heated at reflux until the starting material was consumed monitored by HPLC-MS. The solution was cooled and water was added. The reaction mixture was extracted twice with ethyl acetate and the combined organic layers were dried, filtered and concentrated. The residue was purified by column chromatography eluting with 5% methanol/dichloromethane to provide the desired product as an off-white solid (43 mg, 63%). 1H NMR (CDCl3) δ 7.84 (dd, J=1.8 and 9.1 Hz, 1H), 7.74 (s, 1H), 7.46-7.27 (m, 5H), 1.64 (s, 6H); MS (m/e): 273 (MH+); HRMS: calc'd MH+ for C15H13ClN2O 273.0794; found 273.0800.

Workup

  1. temperatureThe mixture was heated
  2. temperatureat reflux until the starting material
  3. customwas consumed
  4. temperatureThe solution was cooled
  5. additionwater was added
  6. extractionThe reaction mixture was extracted twice with ethyl acetate
  7. customthe combined organic layers were dried
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe residue was purified by column chromatography
  11. washeluting with 5% methanol/dichloromethane

Sources & evidence

ORD record
ord-a84a47a8b9bb4379aa458b2b81a96089
Source dataset
uspto-grants-2008_03
Patent number
US07348432B2

Reaction notes

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