Ethyl Acetate → 1-[4-fluoro-1-{[5-(fluoromethyl)-2-furyl]sulfonyl}-5-(2-fluoropyridin-3-yl)-1H-pyrrol-3-yl]-N-methylmethanamine fumarate

HRID 1426822Notes

Reaction equation

HRID 1426822 reaction equation
[F:1][C:2]1[C:3]([CH2:24][N:25](C)[C:26](=O)OC(C)(C)C)=[CH:4][N:5]([S:14]([C:17]2[O:18][C:19]([CH2:22][F:23])=[CH:20][CH:21]=2)(=[O:16])=[O:15])[C:6]=1[C:7]1[C:8]([F:13])=[N:9][CH:10]=[CH:11][CH:12]=1.[C:34]([O:37]CC)(=[O:36])[CH3:35].Cl.[C:41]([O:44]CC)(=[O:43])[CH3:42]>CC(O)C>[C:41]([OH:44])(=[O:43])/[CH:42]=[CH:35]/[C:34]([OH:37])=[O:36].[F:1][C:2]1[C:3]([CH2:24][NH:25][CH3:26])=[CH:4][N:5]([S:14]([C:17]2[O:18][C:19]([CH2:22][F:23])=[CH:20][CH:21]=2)(=[O:15])=[O:16])[C:6]=1[C:7]1[C:8]([F:13])=[N:9][CH:10]=[CH:11][CH:12]=1

Participants

5

Reactant 3

HCID 8857Ethyl AcetateHCID 21866389Hydrogen chloride-ethyl acetateHCID 67397220tert-butyl {[4-fluoro-1-{[5-(fluoromethyl)-2-furyl]sulfonyl}-5-(2-fluoropyridin-3-yl)-1H-pyrrol-3-yl]methyl}methylcarbamate

Product 1

HCID 673962941-[4-fluoro-1-{[5-(fluoromethyl)-2-furyl]sulfonyl}-5-(2-fluoropyridin-3-yl)-1H-pyrrol-3-yl]-N-methylmethanamine fumarateYield 87%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

To a solution of tert-butyl {[4-fluoro-1-{[5-(fluoromethyl)-2-furyl]sulfonyl}-5-(2-fluoropyridin-3-yl)-1H-pyrrol-3-yl]methyl}methylcarbamate (165 mg) in ethyl acetate (2 mL) and 2-propanol (1 mL) was added 4 mol/L hydrogen chloride-ethyl acetate solution (3 mL), and the mixture was stirred at room temperature for 3 hr. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with saturated aqueous sodium hydrogen carbonate solution, and extracted with ethyl acetate. The separated aqueous layer was extracted again with ethyl acetate. The combined organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (eluent: hexane-ethyl acetate=1:1→ethyl acetate) to give a free base of the title compound as a colorless oil (yield 114 mg, 87%). A solution of the obtained free base (114 mg) in ethyl acetate (2 mL) was added dropwise to a solution of fumaric acid (34.4 mg) in ethanol (2 mL) and the mixture was concentrated under reduced pressure. The residue was recrystallized from ethanol to give the title compound as a white solid (yield 94.6 mg, 56%).

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. additionthe residue was diluted with saturated aqueous sodium hydrogen carbonate solution
  3. extractionextracted with ethyl acetate
  4. extractionThe separated aqueous layer was extracted again with ethyl acetate
  5. washThe combined organic layer was washed with saturated brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by basic silica gel column chromatography (eluent: hexane-ethyl acetate=1:1→ethyl acetate)

Sources & evidence

ORD record
ord-45154c85c67c4c209266fc04e7515b62
Source dataset
uspto-grants-2015_01
Patent number
US08933105B2

Reaction notes

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