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Cyclohexanone → 1-(4-Bromophenyl)cyclohexanol

HRID 1454407
Notes
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Reaction equation

HRID 1454407 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5](I)=[CH:4][CH:3]=1.C([Mg]Cl)(C)C.[C:14]1(=[O:20])[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15]1.[Cl-].[NH4+]>O1CCCC1.C(OCC)(=O)C>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:14]2([OH:20])[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15]2)=[CH:4][CH:3]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 7967CyclohexanoneHCID 115221-Bromo-4-iodobenzeneHCID 25517Ammonium ChlorideHCID 178418918HCID 178418918, compound

Product 1

HCID 591070641-(4-Bromophenyl)cyclohexanolYield 79.7%

Reagents, catalysts & solvents 2

HCID 8028
Tetrahydrofuran
Solvent
2×
HCID 8857Ethyl AcetateSolvent

Procedure

4-Bromo-1-iodobenzene (5 g, 17.7 mmol) in tetrahydrofuran (20 mL) at −40° C. was treated dropwise with isopropyl magnesium chloride (2 M solution in tetrahydrofuran, 23 mmol, 11.5 mL) and following addition was stirred 1 hour. Cyclohexanone (1.5 mL, 14.75 mmol) in tetrahydrofuran (5 mL) was added and the solution was allowed to slowly warm to room temperature over 3 hours. Saturated aqueous ammonium chloride solution was added and the mixture was then diluted with ethyl acetate. The aqueous and organic layers were separated and the organic layer was washed with water (1×) and brine (1×). The combined aqueous layers were extracted with ethyl acetate (3×10 mL), the combined organic layers were dried over magnesium sulfate, were filtered, and the solvent was removed in vacuo. The residue was purified by silica gel chromatography (20:1 hexanes-ethyl acetate) to afford 3 g (67% yield) of 1-(4-bromo-phenyl)-cyclohexanol. 13C NMR (100 MHz, CDCl3) □ 148.8, 131.4, 126.8, 120.8, 73.2, 38.9, 25.6, 22.3.

Workup

  1. additionaddition
  2. customThe aqueous and organic layers were separated
  3. washthe organic layer was washed with water (1×) and brine (1×)
  4. extractionThe combined aqueous layers were extracted with ethyl acetate (3×10 mL)
  5. dry with materialthe combined organic layers were dried over magnesium sulfate
  6. filtrationwere filtered
  7. customthe solvent was removed in vacuo
  8. customThe residue was purified by silica gel chromatography (20:1 hexanes-ethyl acetate)

Sources & evidence

ORD record
ord-9bffe55bfcab483c8a0f68d28662746a
Source dataset
uspto-grants-2009_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07479559B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes