Benzenesulfonyl chloride → HCID 66924523, compound

HRID 554274Notes

Reaction equation

HRID 554274 reaction equation
[F:1][C:2]1[NH:3][C:4]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[CH:5][C:6]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8].[H-].[Na+].C1OCCOCCOCCOCCOC1.[C:35]1([S:41](Cl)(=[O:43])=[O:42])[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1>O1CCCC1.[Cl-].[Na+].O>[F:1][C:2]1[N:3]([S:41]([C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)(=[O:43])=[O:42])[C:4]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[CH:5][C:6]=1[C:7]([O:9][CH2:10][CH3:11])=[O:8]

Participants

7

Reactant 4

HCID 7369Benzenesulfonyl chlorideHCID 24758Sodium hydrideHCID 3633615-Crown-5HCID 66924897HCID 66924897, compound

Product 1

HCID 66924523HCID 66924523, compoundYield 81.2%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 57417360Sodium chloride; waterSolvent

Procedure

To a solution (20 mL) of ethyl 2-fluoro-5-phenyl-1H-pyrrole-3-carboxylate (300 mg) in tetrahydrofuran was added sodium hydride (60% in oil, 155 mg) at room temperature and the mixture was stirred for 30 min. 15-Crown-5 (850 mg) was added dropwise and the mixture was stirred for 30 min. Benzenesulfonyl chloride (591 mg) was added, and the mixture was further stirred for 24 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=85:15) to give the title compound as a colorless oil (yield 390 mg, 81%).

Workup

  1. stirringthe mixture was stirred for 30 min
  2. stirringthe mixture was further stirred for 24 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=85:15)

Sources & evidence

ORD record
ord-ee45601624bf42e0ae50f16e3949032f
Source dataset
uspto-grants-2011_11
Patent number
US08048909B2

Reaction notes

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