1-Benzylpiperidine-4-carbaldehyde → 1-(1-Benzylpiperidin-4-yl)-2-[2-(trifluoromethyl)phenyl]ethanone

HRID 606197Notes

Reaction equation

HRID 606197 reaction equation
[F:1][C:2]([F:12])([F:11])[C:3]1[CH:10]=[CH:9][CH:8]=[CH:7][C:4]=1[CH:5]=O.C[O-].[K+].[CH2:16]([N:23]1[CH2:28][CH2:27][CH:26]([CH:29]=[O:30])[CH2:25][CH2:24]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>CO>[CH2:16]([N:23]1[CH2:28][CH2:27][CH:26]([C:29](=[O:30])[CH2:5][C:4]2[CH:7]=[CH:8][CH:9]=[CH:10][C:3]=2[C:2]([F:12])([F:11])[F:1])[CH2:25][CH2:24]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

5

Reactant 3

HCID 895841-Benzylpiperidine-4-carbaldehydeHCID 123067o-(Trifluoromethyl)benzaldehydeHCID 23664618Potassium methoxide

Product 1

HCID 222479231-(1-Benzylpiperidin-4-yl)-2-[2-(trifluoromethyl)phenyl]ethanoneYield 49%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

After dissolving 2.57 g of 2-(trifluoromethyl)benzaldehyde in 15 ml of methanol, 2.75 g of p-toluenesulfonyl hydrazide was added, the mixture was stirred at room temperature for 2 hours, and then 1.09 g of potassium methoxide and a methanol solution (4 ml) of 1.50 g of 1-benzylpiperidine-4-carboxaldehyde was added, and the mixture was shielded from light and stirred overnight at 55° C. The reaction solution was concentrated under reduced pressure, water was added, 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 silica gel column chromatography (solvent: toluene/ethyl acetate) to obtain the title compound (1.30 g, 49% yield).

Workup

  1. additionwas added
  2. stirringstirred overnight at 55° C
  3. concentrationThe reaction solution was concentrated under reduced pressure, water
  4. additionwas added
  5. extractionextraction
  6. washThe organic layer was washed with saturated brine
  7. dry with materialdried over anhydrous magnesium sulfate
  8. distillationthe solvent was distilled off under reduced pressure
  9. customThe residue was purified by silica gel column chromatography (solvent: toluene/ethyl acetate)

Sources & evidence

ORD record
ord-aa07476838d34976ad0adc4f32b04fa9
Source dataset
uspto-grants-2011_03
Patent number
US07915274B2

Reaction notes

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