Water → HCID 58027029, compound

HRID 1966265Notes

Reaction equation

HRID 1966265 reaction equation
[CH3:1][O:2][C:3]1[C:8](B(O)O)=[CH:7][CH:6]=[CH:5][N:4]=1.Br[C:13]1[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][C:14]=1[C:15]([O:17][CH3:18])=[O:16].C(=O)([O-])[O-].[Cs+].[Cs+].O>CN(C)C=O.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>[CH3:1][O:2][C:3]1[C:8]([C:13]2[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][C:14]=2[C:15]([O:17][CH3:18])=[O:16])=[CH:7][CH:6]=[CH:5][N:4]=1

Participants

7

Reactant 4

HCID 962WaterHCID 10796Cesium carbonateHCID 245494Methyl 2-Bromo-5-nitrobenzoateHCID 2762709(2-Methoxypyridin-3-yl)boronic acid

Product 1

HCID 58027029HCID 58027029, compoundYield 81.7%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 2-methoxypyridin-3-ylboronic acid (1.00 g, 6.54 mmol), methyl 2-bromo-5-nitrobenzoate (2.21 g, 8.50 mmol), cesium carbonate (6.39 g, 17.6 mmol) and bis(triphenylphosphine)palladium(II) dichloride (230 mg, 0.33 mmol) was suspended in anhydrous N,N-dimethylformamide (15 mL), and then the mixture was stirred under nitrogen atmosphere at 80° C. overnight. After cooling down, water (100 mL) was added thereto, and then the whole was extracted with ethyl acetate (80 mL, twice). The combined organic layer was washed with saturated brine (100 mL), dried over anhydrous magnesium sulfate, and then the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate) to give the titled reference compound (1.54 g) as a yellow solid. (Yield 81%)

Workup

  1. temperatureAfter cooling down
  2. extractionthe whole was extracted with ethyl acetate (80 mL
  3. washThe combined organic layer was washed with saturated brine (100 mL)
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customthe solvent was removed under reduced pressure
  6. customThe obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate)

Sources & evidence

ORD record
ord-50a3242aafc342cda1fcc05049f12469
Source dataset
uspto-grants-2013_04
Patent number
US08420635B2

Reaction notes

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