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Potassium Carbonate → Ethyl 7-(4-trifluoromethylphenyl)-2,3-dihydro-1-benzoxepine-4-carboxylate

HRID 2228197
Notes
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Reaction equation

HRID 2228197 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:11][CH2:10][CH2:9][C:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])=[CH:7][C:6]=2[CH:17]=1.B([O-])([O-])O[C:20]1[CH:25]=[CH:24][C:23]([C:26]([F:29])([F:28])[F:27])=[CH:22][CH:21]=1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C(CCO)=CC=CC=1.O.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>[F:27][C:26]([F:29])([F:28])[C:23]1[CH:24]=[CH:25][C:20]([C:2]2[CH:3]=[CH:4][C:5]3[O:11][CH2:10][CH2:9][C:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])=[CH:7][C:6]=3[CH:17]=2)=[CH:21][CH:22]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 10709089HCID 10709089, compoundHCID 867561674-Trifluoromethylphenyl borate

Product 1

HCID 10808612Ethyl 7-(4-trifluoromethylphenyl)-2,3-dihydro-1-benzoxepine-4-carboxylateYield 80.2%

Reagents, catalysts & solvents 2

HCID 178418397
HCID 178418397, compound
Catalyst
HCID 66602552Toluene-ethanol waterSolvent

Procedure

Under argon atmosphere, a solution of ethyl 7-bromo-2,3-dihydro-1-benzoxepine-4-carboxylate (500 mg), 4-tri-fluoromethylphenyl borate (351.5 mg) and potassium carbonate (0.47 g) in toluene-ethanol-water (20-2-2 ml) was stirred at room temperature for 1 hour. To the reaction mixture was added tetrakistriphenylphosphinepalladium (0.06 g), and the mixture was refluxed for 20 hours and cooled to room temperature. The organic layer was washed with saturated sodium chloride solution, dried with magnesium sulfate and concentrated under reduced pressure. The residue was separated and purified with column chromatography (ethyl acetate/hexane=1:10) to give ethyl 7—(4-trifluoromethylphenyl)-2,3-dihydro-1-benzoxepine-4-carboxylate (489 mg) as colorless crystals.

Workup

  1. temperaturethe mixture was refluxed for 20 hours
  2. washThe organic layer was washed with saturated sodium chloride solution
  3. dry with materialdried with magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was separated
  6. custompurified with column chromatography (ethyl acetate/hexane=1:10)

Sources & evidence

ORD record
ord-b8cfc474184c420ba8488bb59153175d
Source dataset
uspto-grants-2002_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06413947B1

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes