1-Benzyl-4-piperidone → HCID 58772035, compound

HRID 1361508Notes

Reaction equation

HRID 1361508 reaction equation
Br[C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[O:9][CH3:10].[Li]CCCC.[CH2:16]([N:23]1[CH2:28][CH2:27][C:26](=[O:29])[CH2:25][CH2:24]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>C1COCC1>[CH2:16]([N:23]1[CH2:28][CH2:27][C:26]([C:2]2[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=2[O:9][CH3:10])([OH:29])[CH2:25][CH2:24]1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Participants

5

Reactant 3

HCID 192201-Benzyl-4-piperidoneHCID 5219352-Bromo-4-chloroanisoleHCID 178418339Butyllithium

Product 1

HCID 58772035HCID 58772035, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

To a solution of 2-bromo-4-chloroanisole (1a, 51 g, 0.23 mol) in THF (500 mL) was added dropwise n-BuLi (2.5 M in hexane, 138 mL, 0.345 mol) at −78° C. under nitrogen atmosphere. After being stirred at −78° C. for 1 h, 1-benzyl-piperidin-4-one (42 g, 0.22 mol) was added dropwise. After addition, the mixture was stirred at this temperature for 1 h, and then warmed to room temperature. The reaction was quenched with saturated NH4Cl (300 mL) and the separated aqueous layer was extracted with ethyl acetate (150 mL×3). The combined extracts were washed with water and brine, dried over Na2SO4, concentrated to dryness. The residue was purified by silica gel column to obtain 1-benzyl-4-(5-chloro-2-methoxy-phenyl)-piperidin-4-ol 1b as a white solid. 1H NMR (CDCl3): δ 7.37-7.24 (m, 6H), 7.21 (q, J1=8.8 Hz, J2=2.8 Hz, 1H), 6.85 (d, J=8.8 Hz, 1H), 3.88 (s, 3H), 3.80 (s, 1H), 3.59 (s, 2, H), 2.77-2.74 (m, 2, H), 2.59-2.54 (t, 2H), 2.13-2.06 (m, 2H), 2.00-1.96 (m, 2H).

Workup

  1. additionAfter addition
  2. stirringthe mixture was stirred at this temperature for 1 h
  3. temperaturewarmed to room temperature
  4. customThe reaction was quenched with saturated NH4Cl (300 mL)
  5. extractionthe separated aqueous layer was extracted with ethyl acetate (150 mL×3)
  6. washThe combined extracts were washed with water and brine
  7. dry with materialdried over Na2SO4
  8. concentrationconcentrated to dryness
  9. customThe residue was purified by silica gel column

Sources & evidence

ORD record
ord-5f381344ca6a4df9a8c762a4f23702b6
Source dataset
uspto-grants-2011_02
Patent number
US07880007B2

Reaction notes

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