Sodium hydride → 5-(2,6-difluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carbaldehyde

HRID 2197164Notes

Reaction equation

HRID 2197164 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([F:8])[C:3]=1[C:9]1[NH:13][CH:12]=[C:11]([CH:14]=[O:15])[CH:10]=1.[H-].[Na+].C1OCCOCCOCCOCCOC1.Cl.[N:34]1[CH:39]=[CH:38][CH:37]=[C:36]([S:40](Cl)(=[O:42])=[O:41])[CH:35]=1>O1CCCC1.[Cl-].[Na+].O>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([F:8])[C:3]=1[C:9]1[N:13]([S:40]([C:36]2[CH:35]=[N:34][CH:39]=[CH:38][CH:37]=2)(=[O:42])=[O:41])[CH:12]=[C:11]([CH:14]=[O:15])[CH:10]=1

Participants

7

Reactant 4

HCID 24758Sodium hydrideHCID 3633615-Crown-5HCID 12571517Pyridine-3-sulfonyl chloride hydrochlorideHCID 866309715-(2,6-difluorophenyl)-1H-pyrrole-3-carbaldehyde

Product 1

HCID 866309765-(2,6-difluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carbaldehydeYield 84%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

To a solution of 5-(2,6-difluorophenyl)-1H-pyrrole-3-carbaldehyde (420 mg) in tetrahydrofuran (42 mL) was added sodium hydride (60% in oil, 244 mg) at room temperature and the mixture was stirred for 30 min. 15-Crown-5 (1.34 g) was added dropwise and the mixture was stirred for 30 min. 3-Pyridylsulfonyl chloride hydrochloride (565 mg) was added, and the mixture was further stirred for 1 hr. The reaction mixture was diluted with saturated brine, and the mixture was extracted with ethyl acetate. The obtained extract was washed with water and 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=7:3→1:1), and crystallized from diisopropyl ether to give the title compound as colorless crystals (yield 590 mg, 84%).

Workup

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

Sources & evidence

ORD record
ord-d2592722acc0432fbda69ffc8f9a08b6
Source dataset
uspto-grants-2012_12
Patent number
US08338462B2

Reaction notes

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