Potassium Hydroxide → Dibenzyl ether

HRID 510458Notes

Reaction equation

HRID 510458 reaction equation
[OH-:1].[K+].C(P(C(C)(C)C)C1C=CC=CC=1[C:14]1[C:19](C(C)C)=[CH:18][C:17](C(C)C)=[CH:16][C:15]=1[CH:26](C)C)(C)(C)C>C1(C)C=CC=CC=1.CCOC(C)=O.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[CH2:26]([O:1][CH2:26][C:15]1[CH:14]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:14]=1

Participants

6

Reactant 2

HCID 14797Potassium HydroxideHCID 11618717Di-tert-butyl(2',4',6'-tris(propan-2-yl)-(1,1'-biphenyl)-2-yl)phosphane

Product 1

HCID 7657Dibenzyl ether

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

Method C) Compound 10 was dissolved in toluene (8 mml/mmol) and to the solution was added potassium hydroxide (2 eq, 11.7N) and the solution was degassed. To the solution was added properly substituted benzyl bromide (1.1 eq), 2-di-t-butylphosphino-2′,4′,6′-triisopropylbiphenyl (0.06 eq) and tris-(dibenzylideneaceton)-dipalladium(0) (0.03 eq). The mixture was stirred at 60° C. for 1.25 hrs. The mixture was cooled to room temperature, diluted with EtOAc and washed with 5% NaHCO3 solution (10 ml/mmol). The organic layers were dried on MgSO4, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography to give compound 12 in yields varying from 30-80%.

Workup

  1. customthe solution was degassed
  2. temperatureThe mixture was cooled to room temperature
  3. washwashed with 5% NaHCO3 solution (10 ml/mmol)
  4. customThe organic layers were dried on MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-5b09923c49e2475893942f7be42a4b01
Source dataset
uspto-grants-2015_08
Patent number
US09096612B2

Reaction notes

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