Sodium Thiosulfate → N-(2-fluoro-3-formyl-phenyl)-4-trifluoromethyl-benzenesulfonamide

HRID 1639597Notes

Reaction equation

HRID 1639597 reaction equation
[F:1][C:2]1[C:7]([CH2:8][OH:9])=[CH:6][CH:5]=[CH:4][C:3]=1[NH:10][S:11]([C:14]1[CH:19]=[CH:18][C:17]([C:20]([F:23])([F:22])[F:21])=[CH:16][CH:15]=1)(=[O:13])=[O:12].CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C1=CC=CC=2)=O.C(=O)(O)[O-].[Na+].S([O-])([O-])(=O)=S.[Na+].[Na+]>O1CCCC1>[F:1][C:2]1[C:7]([CH:8]=[O:9])=[CH:6][CH:5]=[CH:4][C:3]=1[NH:10][S:11]([C:14]1[CH:19]=[CH:18][C:17]([C:20]([F:23])([F:21])[F:22])=[CH:16][CH:15]=1)(=[O:13])=[O:12]

Participants

6

Reactant 4

HCID 24477Sodium ThiosulfateHCID 159087TriacetoxyperiodinaneHCID 516892Sodium BicarbonateHCID 57963251N-(2-fluoro-3-hydroxymethyl-phenyl)-4-trifluoromethyl-benzenesulfonamide

Product 1

HCID 57963257N-(2-fluoro-3-formyl-phenyl)-4-trifluoromethyl-benzenesulfonamideYield 96%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To N-(2-fluoro-3-hydroxymethyl-phenyl)-4-trifluoromethyl-benzenesulfonamide (25, 634 mg, 1.82 mmol) in 7 mL of tetrahydrofuran, Dess-Martin periodane (847 mg, 2.00 mmol) and sodium bicarbonate (2 g) were added. The reaction was stirred at room temperature for one hour, then poured into saturated aqueous sodium thiosulfate solution and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and the filtrate concentrated under vacuum. The resulting material was purified by silica gel column chromatography eluting with 15% ethyl acetate in hexane. Appropriate fractions were combined and concentrated under vacuum to provide the desired compound (26, 607 mg, 96%). MS (ESI) [M−H+]−=346.4.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationthe filtrate concentrated under vacuum
  6. customThe resulting material was purified by silica gel column chromatography
  7. washeluting with 15% ethyl acetate in hexane
  8. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-fc6b9f78b68442cf8830939a0201ef45
Source dataset
uspto-grants-2012_02
Patent number
US08110576B2

Reaction notes

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