Sodium borohydride → HCID 66835730, compound

HRID 2404485Notes

Reaction equation

HRID 2404485 reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[CH:10]([O:19][CH:20]1[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]1)[C:11]1[CH:12]=[C:13]([CH:16]=[CH:17][CH:18]=1)[CH:14]=[O:15].[BH4-].[Na+]>CO>[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[CH:10]([O:19][CH:20]1[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]1)[C:11]1[CH:12]=[C:13]([CH2:14][OH:15])[CH:16]=[CH:17][CH:18]=1

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 86695327HCID 86695327, compound

Product 1

HCID 66835730HCID 66835730, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 3-[(1H-benzimidazol-2-yl)(1-methylpiperidin-4-yloxy)methyl]benzaldehyde (example 505B, 310 mg) in methanol (4 mL) is added portionwise sodium borohydride (50 mg). The reaction mixture is stirred at room temperature for 15 minutes then heated at reflux for 3 h. Methanol is removed under reduced pressure. Water is added and the aqueous phase is extracted by ethyl acetate. The organic phase is washed by water, then dried over magnesium sulfate and concentrated to give {3-[(1H-benzimidazol-2-yl)(1-methylpiperidin-4-yloxy)methyl]phenyl}methanol. 1H NMR: 9.85 (sl, 1H), 7.78-7.65 (m, 1H), 7.50-7.12 (m, 7H), 5.87 (s, 1H), 4.64 (s, 2H), 3.62-3.45 (m, 1H), 2.78-2.58 (m, 2H), 2.22 (s, 3H), 2.15-1.50 (m, 6H).

Workup

  1. temperaturethen heated
  2. temperatureat reflux for 3 h
  3. customMethanol is removed under reduced pressure
  4. additionWater is added
  5. extractionthe aqueous phase is extracted by ethyl acetate
  6. washThe organic phase is washed by water
  7. dry with materialdried over magnesium sulfate
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-35d612d86bca4aefad78f9b347c96785
Source dataset
uspto-grants-2014_08
Patent number
US08802664B2

Reaction notes

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