Sodium hydride → 1-(Pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehyde

HRID 554331Notes

Reaction equation

HRID 554331 reaction equation
[F:1][C:2]([F:17])([F:16])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[NH:13][CH:12]=[C:11]([CH:14]=[O:15])[CH:10]=1.[H-].[Na+].C1OCCOCCOCCOCCOC1.Cl.[N:36]1[CH:41]=[CH:40][CH:39]=[C:38]([S:42](Cl)(=[O:44])=[O:43])[CH:37]=1>O1CCCC1.[Cl-].[Na+].O>[N:36]1[CH:41]=[CH:40][CH:39]=[C:38]([S:42]([N:13]2[C:9]([C:4]3[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=3[C:2]([F:16])([F:1])[F:17])=[CH:10][C:11]([CH:14]=[O:15])=[CH:12]2)(=[O:44])=[O:43])[CH:37]=1

Participants

7

Reactant 4

HCID 24758Sodium hydrideHCID 3633615-Crown-5HCID 12571517Pyridine-3-sulfonyl chloride hydrochlorideHCID 862327755-[2-(Trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehyde

Product 1

HCID 866207601-(Pyridin-3-ylsulfonyl)-5-[2-(trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehydeYield 100%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

To a solution (36 mL) of 5-[2-(trifluoromethyl)phenyl]-1H-pyrrole-3-carbaldehyde (240 mg) in tetrahydrofuran was added sodium hydride (60% in oil, 201 mg) at room temperature and the mixture was stirred for 30 min. 15-Crown-5 (1.11 g) was added dropwise and the mixture was stirred for 30 min. Pyridine-3-sulfonyl chloride hydrochloride (537 mg) was added, and the mixture was further stirred for 3 hr. Saturated brine was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=4:1→2:3) and crystallized from diisopropyl ether to give the title compound as colorless crystals (yield 380 mg, about 100%).

Workup

  1. stirringthe mixture was stirred for 30 min
  2. stirringthe mixture was further stirred for 3 hr
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=4:1→2:3)
  8. customcrystallized from diisopropyl ether

Sources & evidence

ORD record
ord-88c6a889dea7426f878b10dc3d46b61a
Source dataset
uspto-grants-2011_11
Patent number
US08048909B2

Reaction notes

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