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

HRID 2244842Notes

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]

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)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 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
Patent number
US07678929B2

Reaction notes

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