Sodium borohydride → (2,3-Dimethoxyphenyl)-[1-[2-(4-fluorophenyl)ethyl]piperidin-4-yl]methanol

HRID 1940590Notes

Reaction equation

HRID 1940590 reaction equation
[CH3:1][O:2][C:3]1[C:8]([O:9][CH3:10])=[CH:7][CH:6]=[CH:5][C:4]=1[C:11]([CH:13]1[CH2:18][CH2:17][N:16]([CH2:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([F:27])=[CH:23][CH:22]=2)[CH2:15][CH2:14]1)=[O:12].[BH4-].[Na+]>CO>[CH3:1][O:2][C:3]1[C:8]([O:9][CH3:10])=[CH:7][CH:6]=[CH:5][C:4]=1[CH:11]([CH:13]1[CH2:14][CH2:15][N:16]([CH2:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([F:27])=[CH:23][CH:22]=2)[CH2:17][CH2:18]1)[OH:12]

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 10595416(2,3-Dimethoxyphenyl)[1-[2-(4-fluorophenyl)ethyl]-4-piperidinyl]methanone

Product 1

HCID 60858(2,3-Dimethoxyphenyl)-[1-[2-(4-fluorophenyl)ethyl]piperidin-4-yl]methanol

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a stirred solution of (2,3-dimethoxyphenyl)[1-[2-(4-fluorophenyl)ethyl]-4-piperidinyl]methanone (6.0 g, 16.2 mmol) in MeOH (100 mL) at 0° C. was added NaBH4 (1240 mg, 32.8 mmol) in two portions, over a one hour period. After stirring overnight, the solution was concentrated to a solid. The solid was partitioned between water and ether. The layers were separated and the aqueous layer was extracted with ether. The combined organic layers were washed with brine, dried (MgSO4), filtered, and evaporated to a solid. The solid was chromatographed on silica gel, eluting with acetone. The appropriate fractions were combined and evaporated to afford a white solid. The solid was recrystallized from cyclohexane to afford (±)-α-(2,3-dimethoxyphenyl)-1-[2-(4-fluorophenyl)-ethyl]-4-piperidinemethanol as white needles, m.p. 126°-127° C. Anal. Calcd for C22H28FNO3 : C, 70.75; H, 7.56; N, 3.75. Found: C, 70.86; H, 7.72; N, 3.93.

Workup

  1. concentrationthe solution was concentrated to a solid
  2. customThe solid was partitioned between water and ether
  3. customThe layers were separated
  4. extractionthe aqueous layer was extracted with ether
  5. washThe combined organic layers were washed with brine
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. customevaporated to a solid
  9. customThe solid was chromatographed on silica gel
  10. washeluting with acetone
  11. customevaporated
  12. customto afford a white solid
  13. customThe solid was recrystallized from cyclohexane

Sources & evidence

ORD record
ord-07f58e8d0a1a46ff8d00771d132deb38
Source dataset
uspto-grants-1997_12
Patent number
US05700813

Reaction notes

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