Sodium Bicarbonate → HCID 57522487, compound

HRID 554458Notes

Reaction equation

HRID 554458 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([C:8]2[N:12]([S:13]([C:16]3[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=3)(=[O:15])=[O:14])[CH:11]=[C:10]([CH2:22][N:23](C)[C:24](=O)OC(C)(C)C)[CH:9]=2)[CH:5]=[CH:6][CH:7]=1.C(OCC)(=O)C.[ClH:38].C(=O)([O-])O.[Na+]>C(OCC)(=O)C>[ClH:38].[F:1][C:2]1[CH:3]=[C:4]([C:8]2[N:12]([S:13]([C:16]3[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=3)(=[O:14])=[O:15])[CH:11]=[C:10]([CH2:22][NH:23][CH3:24])[CH:9]=2)[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 516892Sodium BicarbonateHCID 21866389Hydrogen chloride-ethyl acetateHCID 66974746HCID 66974746, compound

Product 1

HCID 57522487HCID 57522487, compound

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

tert-Butyl {[5-(3-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]methyl}methylcarbamate (280 mg) was dissolved in ethyl acetate (3 mL), 4 mol/L hydrogen chloride-ethyl acetate solution (6 mL) was added, and the mixture was stirred at room temperature for 16 hr. The reaction solution was basified by the dropwise addition to 6% aqueous sodium hydrogencarbonate solution, and the mixture was extracted with ethyl acetate. The organic layer 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-hexane=1:1→9:1) to give a free base of the title compound as a pale-yellow oil. The obtained free base was dissolved in ethyl acetate. A 4 mol/L hydrogen chloride-ethyl acetate solution was added, and the mixture was concentrated under reduced pressure. The residue was crystallized from ethyl acetate and hexane, and recrystallized from ethyl acetate-ethanol to give the title compound as colorless crystals (yield 84 mg, 35%).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by basic silica gel column chromatography (eluent: ethyl acetate-hexane=1:1→9:1)

Sources & evidence

ORD record
ord-b02c3c6797b5475485755b8f4a8162d2
Source dataset
uspto-grants-2011_11
Patent number
US08048909B2

Reaction notes

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