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Binap, (A+-)- → 1-[4-(Tetrahydropyran-2-yloxy)phenyl]-4-(4-trifluoromethoxyphenyl)piperazine

HRID 856097
Notes
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Reaction equation

HRID 856097 reaction equation
[F:1][C:2]([F:17])([F:16])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]2)=[CH:6][CH:5]=1.Br[C:19]1[CH:31]=[CH:30][C:22]([O:23][CH:24]2[CH2:29][CH2:28][CH2:27][CH2:26][O:25]2)=[CH:21][CH:20]=1.C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.CC(C)([O-])C.[Na+]>C1(C)C=CC=CC=1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O.C(OCC)(=O)C>[O:25]1[CH2:26][CH2:27][CH2:28][CH2:29][CH:24]1[O:23][C:22]1[CH:30]=[CH:31][C:19]([N:13]2[CH2:12][CH2:11][N:10]([C:7]3[CH:8]=[CH:9][C:4]([O:3][C:2]([F:1])([F:16])[F:17])=[CH:5][CH:6]=3)[CH2:15][CH2:14]2)=[CH:20][CH:21]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

9

Reactant 4

HCID 634876Binap, (A+-)-HCID 46464362-(4-Bromophenoxy)tetrahydro-2H-pyranHCID 230811701-(4-(Trifluoromethoxy)phenyl)piperazineHCID 23676156Sodium t-butoxide

Product 1

HCID 230811991-[4-(Tetrahydropyran-2-yloxy)phenyl]-4-(4-trifluoromethoxyphenyl)piperazineYield 35.9%

Reagents, catalysts & solvents

4
HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 1-(4-trifluoromethoxyphenyl)-piperazine (4.4 g, 17.8 mmol), 2-(4-bromophenoxy)-tetrahydropyran (4.6 g, 17.8 mmol), palladium acetate (159 mg, 0.71 mmol), BINAP (666 mg, 1.07 mmol) and sodium tert-butoxide (2.2 g, 23.1 mmol) in toluene (40 ml) was refluxed under a nitrogen atmosphere for 5 hours. Ethyl acetate and water were added to the reaction mixture, which was stirred for a while. The insoluble substances were removed by filtration through Celite, and the filtrate was then extracted with ethyl acetate. The extract was washed with brine, dried over magnesium sulfate, and then filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=20/1) to afford 1-[4-(tetrahydropyran-2-yloxy)phenyl]-4-(4-trifluoromethoxyphenyl)piperazine (2.7 g, yield 35%) as a white powder.

Workup

  1. temperaturewas refluxed under a nitrogen atmosphere for 5 hours
  2. customThe insoluble substances were removed by filtration through Celite
  3. extractionthe filtrate was then extracted with ethyl acetate
  4. washThe extract was washed with brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated under reduced pressure
  8. customthe residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=20/1)

Sources & evidence

ORD record
ord-5c2fe5f738a940adab0ec2714f488092
Source dataset
uspto-grants-2007_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07262212B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes