Hydrochloric Acid → N-Methyl-1-{1-(pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrol-3-yl}methanamine dihydrochloride

HRID 2090761Notes

Reaction equation

HRID 2090761 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([S:7]([N:10]2[C:14]([C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=3[C:21]([F:24])([F:23])[F:22])=[CH:13][C:12]([CH:25]=O)=[CH:11]2)(=[O:9])=[O:8])[CH:2]=1.CO.[CH3:29][NH2:30].[BH4-].[Na+].[ClH:33].C(=O)([O-])O.[Na+]>C(O)C>[ClH:33].[ClH:33].[CH3:29][NH:30][CH2:25][C:12]1[CH:13]=[C:14]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[C:21]([F:24])([F:23])[F:22])[N:10]([S:7]([C:3]2[CH:2]=[N:1][CH:6]=[CH:5][CH:4]=2)(=[O:9])=[O:8])[CH:11]=1

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 57454252Monomethylamine methanolHCID 866207601-(Pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehyde

Product 1

HCID 57522372N-Methyl-1-{1-(pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrol-3-yl}methanamine dihydrochlorideYield 69%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

1-(Pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehyde (340 mg) was dissolved in ethanol (34 mL), a 40% methylamine methanol solution (695 mg) was added at room temperature and the mixture was stirred for 30 min. Sodium borohydride (102 mg) was added at room temperature and the mixture was stirred for 10 min. 1 mol/L Hydrochloric acid (10 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) and dissolved in ethyl acetate (5 mL). A 4 mol/L hydrogen chloride-ethyl acetate solution (1 mL) was added and the mixture was concentrated under reduced pressure. The residue was crystallized from ethyl acetate to give the title compound as pale-red crystals (yield 288 mg, 69%).

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)
  8. dissolutiondissolved in ethyl acetate (5 mL)
  9. additionA 4 mol/L hydrogen chloride-ethyl acetate solution (1 mL) was added
  10. concentrationthe mixture was concentrated under reduced pressure
  11. customThe residue was crystallized from ethyl acetate

Sources & evidence

ORD record
ord-369237b13f8e44bd85ca84114d40b6cc
Source dataset
uspto-grants-2013_05
Patent number
US08436187B2

Reaction notes

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