2-Bromoanisole → 2-(1-Benzylpiperidin-4-yl)-1-(2-methoxyphenyl)ethanol

HRID 890018Notes

Reaction equation

HRID 890018 reaction equation
Br[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[O:8][CH3:9].[CH2:10]([N:17]1[CH2:22][CH2:21][CH:20]([CH2:23][CH:24]=[O:25])[CH2:19][CH2:18]1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.[Cl-].[NH4+]>O1CCCC1.C([Li])CCC>[CH2:10]([N:17]1[CH2:22][CH2:21][CH:20]([CH2:23][CH:24]([C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=2[O:8][CH3:9])[OH:25])[CH2:19][CH2:18]1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

6

Reactant 3

HCID 113582-BromoanisoleHCID 25517Ammonium ChlorideHCID 100136024-Piperidineacetaldehyde, 1-(phenylmethyl)-

Product 1

HCID 222484442-(1-Benzylpiperidin-4-yl)-1-(2-methoxyphenyl)ethanolYield 69%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolvent2×HCID 178418339ButyllithiumSolvent

Procedure

After dissolving 2.04 g of 2-bromoanisole in 22 ml of tetrahydrofuran, 3.6 ml of n-butyllithium (2.66 M, n-hexane solution) was added dropwise while stirring at below −60° C., and after 30 minutes, a solution of 1.58 g of 1-benzylpiperidine-4-acetaldehyde in tetrahydrofuran (5 ml) was added and stirring was continued for 30 minutes. Saturated aqueous ammonium chloride solution was added, the temperature was raised to room temperature, and extraction was performed with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The residue was purified by NH silica gel column chromatography (solvent: n-hexane/ethyl acetate) to obtain the title compound (1.63 g, 69% yield).

Workup

  1. additionwas added dropwise
  2. stirringstirring
  3. waitwas continued for 30 minutes
  4. extractionextraction
  5. washThe organic layer was washed with saturated brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. distillationthe solvent was distilled off under reduced pressure
  8. customThe residue was purified by NH silica gel column chromatography (solvent: n-hexane/ethyl acetate)

Sources & evidence

ORD record
ord-d1b9cb948ba3435aaadcfb838f5f7efa
Source dataset
uspto-grants-2006_02
Patent number
US06995144B2

Reaction notes

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