Hydrochloric Acid → Vonoprazan fumarate

HRID 1782358Notes

Reaction equation

HRID 1782358 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[N:12]([S:13]([C:16]2[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=2)(=[O:15])=[O:14])[CH:11]=[C:10]([CH:22]=[O:23])[CH:9]=1.C[OH:25].[CH3:26][NH2:27].[BH4-].[Na+].Cl.[C:31](=[O:34])([O-:33])O.[Na+]>CO>[C:22]([OH:23])(=[O:25])/[CH:10]=[CH:11]/[C:31]([OH:33])=[O:34].[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[N:12]([S:13]([C:16]2[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=2)(=[O:15])=[O:14])[CH:11]=[C:10]([CH2:22][NH:27][CH3:26])[CH:9]=1

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 57454252Monomethylamine methanolHCID 862329325-(2-Fluorophenyl)-1-(3-pyridinylsulfonyl)-1H-pyrrole-3-carboxaldehyde

Product 1

HCID 45375887Vonoprazan fumarate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

5-(2-Fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carbaldehyde (1.52 g) was dissolved in methanol (30 mL), a 40% methylamine methanol solution (3.57 g) was added at room temperature and the mixture was stirred for 30 min. Sodium borohydride (523 mg) was added at room temperature and the mixture was stirred for 10 min. 1 mol/L Hydrochloric acid (50 mL) was added and the mixture was stirred for 5 min. The reaction mixture was basified with a saturated aqueous sodium hydrogencarbonate solution, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent: ethyl acetate-methanol=1:0→7:3) to give a free salt of the title compound as a pale-yellow oil (yield 1.30 g). The obtained free salt (750 mg) was dissolved in ethyl acetate (30 mL), a solution of fumaric acid (278 mg) in methanol (3 mL) was added dropwise at room temperature. After stirring for 30 min, the obtained crystals were collected by filtration, and washed with ethyl acetate to give the title compound as colorless crystals (yield 912 mg, 74%).

Workup

  1. stirringthe mixture was stirred for 10 min
  2. stirringthe mixture was stirred for 5 min
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by basic silica gel column chromatography (eluent: ethyl acetate-methanol=1:0→7:3)

Sources & evidence

ORD record
ord-bc30b0b5f94249a4883bc6b18506480c
Source dataset
uspto-grants-2009_03
Patent number
US07498337B2

Reaction notes

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