2-Bromopyridine → Benzyl 2-(benzyloxy)-4-(pyridin-2-yl)benzoate

HRID 454468Notes

Reaction equation

HRID 454468 reaction equation
Br[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][N:3]=1.C(=O)([O-])[O-].[Na+].[Na+].[CH2:14]([O:21][C:22]1[CH:37]=[C:36](B2OC(C)(C)C(C)(C)O2)[CH:35]=[CH:34][C:23]=1[C:24]([O:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:25])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(OCC)(=O)C.O.COCCOC>[CH2:14]([O:21][C:22]1[CH:37]=[C:36]([C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][N:3]=2)[CH:35]=[CH:34][C:23]=1[C:24]([O:26][CH2:27][C:28]1[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=1)=[O:25])[C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1

Participants

8

Reactant 3

HCID 79732-Bromopyridine2×HCID 10340Sodium Carbonate2×HCID 23090759Benzyl 2-benzyloxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate

Product 1

HCID 66990966Benzyl 2-(benzyloxy)-4-(pyridin-2-yl)benzoate

Reagents, catalysts & solvents 4

HCID 178418476HCID 178418476, compoundCatalyst2×HCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

Water (1.1 mL), 2-bromopyridine (0.11 mL), sodium carbonate (0.21 g), and bis(triphenylphosphine)palladium(II) dichloride (14 mg) were added to a solution of ethylene glycol dimethyl ether (3.5 mL) of the obtained benzyl 2-(benzyloxy)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, followed by heating to reflux under a nitrogen atmosphere for 1 hour and 30 minutes. After cooling the reaction mixture to room temperature, 2-bromopyridine (0.11 mL), sodium carbonate (0.21 g), and bis(triphenylphosphine)palladium(II) dichloride (14 mg) were added thereto, followed by heating to reflux under a nitrogen atmosphere for 1 hour and 30 minutes. After cooling the reaction mixture to room temperature, water and ethyl acetate were added thereto, and the insoluble substance was removed by filtration. The organic layer was separated, washed with a saturated aqueous solution of sodium chloride, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography [Fuji Silysia Chemical Ltd., PSQ100B (spherical), eluent: 100-80% hexane/ethyl acetate] to obtain 0.18 g of benzyl 2-(benzyloxy)-4-(pyridin-2-yl)benzoate.

Workup

  1. temperatureby heating
  2. temperatureto reflux under a nitrogen atmosphere for 1 hour and 30 minutes
  3. temperatureby heating
  4. temperatureto reflux under a nitrogen atmosphere for 1 hour and 30 minutes
  5. temperatureAfter cooling the reaction mixture to room temperature
  6. customthe insoluble substance was removed by filtration
  7. customThe organic layer was separated
  8. washwashed with a saturated aqueous solution of sodium chloride
  9. dry with materialdried over anhydrous magnesium sulfate
  10. customthe solvent was evaporated under reduced pressure
  11. customThe obtained residue was purified by silica gel column chromatography [Fuji Silysia Chemical Ltd., PSQ100B (spherical), eluent: 100-80% hexane/ethyl acetate]

Sources & evidence

ORD record
ord-32d843efe10349ec8ccb232201ef1bce
Source dataset
uspto-grants-2013_07
Patent number
US08492582B2

Reaction notes

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