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Hydrochloric Acid → 7,8-Difluoro-2-pentyl-5-(4-propylcyclohexylethynyl)chroman-6-ol

HRID 2244842
Notes
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Reaction equation

HRID 2244842 reaction equation
[F:1][C:2]1[C:11]([F:12])=[C:10]2[C:5]([CH2:6][CH2:7][CH:8]([CH2:13][CH2:14][CH2:15][CH2:16][CH3:17])[O:9]2)=[C:4](I)[C:3]=1[OH:19].[C:20]([CH:22]1[CH2:27][CH2:26][CH:25]([CH2:28][CH2:29][CH3:30])[CH2:24][CH2:23]1)#[CH:21].Cl>C(N(CC)CC)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[F:1][C:2]1[C:11]([F:12])=[C:10]2[C:5]([CH2:6][CH2:7][CH:8]([CH2:13][CH2:14][CH2:15][CH2:16][CH3:17])[O:9]2)=[C:4]([C:21]#[C:20][CH:22]2[CH2:27][CH2:26][CH:25]([CH2:28][CH2:29][CH3:30])[CH2:24][CH2:23]2)[C:3]=1[OH:19]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 313Hydrochloric AcidHCID 218706261-Ethynyl-4-propylcyclohexaneHCID 592152577,8-Difluoro-5-iodo-2-pentylchroman-6-ol

Product 1

HCID 592152687,8-Difluoro-2-pentyl-5-(4-propylcyclohexylethynyl)chroman-6-ol

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)
Catalyst
HCID 178418476HCID 178418476, compoundCatalyst
HCID 8471TriethylamineSolvent

Procedure

8.0 g (20.9 mmol) of 7,8-difluoro-5-iodo-2-pentylchroman-6-ol are stirred at 50° C. for 19 h together with 4.72 g (31.4 mmol) of 1-ethynyl-4-propylcyclohexane in the presence of 441 mg (0.63 mmol) of bis(triphenylphosphine)palladium(II) chloride and 120 mg (0.63 mmol) of copper(I) iodide in 90 ml of triethylamine. After cooling, the batch is added to ice/water and acidified using hydrochloric acid. The mixture is extracted a number of times with MTBE, and the combined extracts are washed with water and sat. sodium chloride soln. The solution is dried using sodium sulfate and concentrated to dryness. The residue is purified by column chromatography (SiO2, 1-chlorobutane). The phenol obtained is used directly for the following reaction.

Workup

  1. temperatureAfter cooling
  2. extractionThe mixture is extracted a number of times with MTBE
  3. washthe combined extracts are washed with water and sat. sodium chloride soln
  4. customThe solution is dried
  5. concentrationconcentrated to dryness
  6. customThe residue is purified by column chromatography (SiO2, 1-chlorobutane)

Sources & evidence

ORD record
ord-3d18bb44540243279dc087295fe9109e
Source dataset
uspto-grants-2010_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07678929B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes