Sodium Hydroxide → Fexofenadine

HRID 1251067Notes

Reaction equation

HRID 1251067 reaction equation
[BH4-].[Na+].[OH-].[Na+].Cl.[OH:6][C:7]([C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1)([C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][CH2:16][C:17]([C:19]2[CH:24]=[CH:23][C:22]([C:25]([CH3:30])([CH3:29])[C:26]([OH:28])=[O:27])=[CH:21][CH:20]=2)=[O:18])[CH2:10][CH2:9]1>O.C(O)C>[OH:6][C:7]([C:37]1[CH:38]=[CH:39][CH:40]=[CH:41][CH:42]=1)([C:31]1[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1)[CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][CH2:16][CH:17]([C:19]2[CH:24]=[CH:23][C:22]([C:25]([CH3:30])([CH3:29])[C:26]([OH:28])=[O:27])=[CH:21][CH:20]=2)[OH:18])[CH2:10][CH2:9]1

Participants

6

Reactant 3

HCID 14798Sodium HydroxideHCID 4311764Sodium borohydrideHCID 10230449Fexofenadinone Hydrochloride

Product 1

HCID 3348Fexofenadine

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

Add sodium borohydride (0.105 g, 2.77 mmol) to a solution of sodium hydroxide (0.0539, 1.33 mmol) in deionized water (2 mL) and add, by dropwise addition, to a solution of 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-α,α-dimethylbenzeneacetic acid hydrochloride (0.70 g, 1.31 mmol) in ethanol (30 mL). Stir at room temperature for 3.5 hours at pH 7-8. Evaporate the solvent in vacuo and stir the residue with methylene chloride (15 mL) and deionized water (15 mL). Dry (MgSO4), acidify to pH 3 with gaseous hydrogen chloride and evaporate the solvent. Add ether with stirring, filter the white solid and wash with additional ether. Dry to give the title compound.

Workup

  1. customEvaporate the solvent in vacuo
  2. stirringstir the residue with methylene chloride (15 mL) and deionized water (15 mL)
  3. dry with materialDry (MgSO4)
  4. customevaporate the solvent
  5. stirringAdd ether with stirring
  6. filtrationfilter the white solid
  7. washwash with additional ether
  8. customDry

Sources & evidence

ORD record
ord-f762d1fa669f43f5958941865233b67a
Source dataset
uspto-grants-2002_01
Patent number
US06340761B1

Reaction notes

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