Potassium Carbonate → HCID 22391370, compound

HRID 2113106Notes

Reaction equation

HRID 2113106 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6](B(O)O)=[CH:5][CH:4]=1.[CH2:12]([O:19][C:20]1[CH:35]=[CH:34][C:23]([C:24]([O:26][CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=2)=[O:25])=[CH:22][C:21]=1Br)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C(O)C.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>[CH2:12]([O:19][C:20]1[CH:35]=[CH:34][C:23]([C:24]([O:26][CH2:27][C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=2)=[O:25])=[CH:22][C:21]=1[C:6]1[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][CH:5]=1)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 201262(4-Methoxyphenyl)boronic acidHCID 22391352HCID 22391352, compound

Product 1

HCID 22391370HCID 22391370, compoundYield 5.6%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 21863594Toluene ethanolSolvent

Procedure

To a degassed solution of 4-methoxybenzeneboronic acid (5.0 g, 32.9 mmol), benzyl 4-benzyloxy-3-bromobenzoate (12.1 g, 30.5 mmol), and potassium carbonate (10.4 g, 76.2 mmol) in toluene/ethanol 2/1, (140 mL), Pd(PPh3)4 (400 mg, 1 mol %) was added and the mixture is degassed for further 5 minutes. The mixture is then refluxed for 12 hours. The mixture was partitioned between ethyl acetate and water and extracted. The organic solvent was dried over sodium sulphate, removed under reduced pressure, and the residue purified by column chromatography (9/1 DCM/hexane) to afford 0.73 g of pure title compound, 9.74 g of a 4:6 mixture of title compound and the corresponding ethyl ester, and 0.71 g of the ethyl ester derivative.

Workup

  1. customthe mixture is degassed for further 5 minutes
  2. temperatureThe mixture is then refluxed for 12 hours
  3. customThe mixture was partitioned between ethyl acetate and water
  4. extractionextracted
  5. dry with materialThe organic solvent was dried over sodium sulphate
  6. customremoved under reduced pressure
  7. customthe residue purified by column chromatography (9/1 DCM/hexane)
  8. customto afford

Sources & evidence

ORD record
ord-bf854204d2c74ed394df05f51f5bc37d
Source dataset
uspto-grants-2009_04
Patent number
US07524873B2

Reaction notes

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