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N-[2-(t-Butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-vinyl-benzamide → N-[2-(t-butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-formyl-benzamide

HRID 661716
Notes
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Reaction equation

HRID 661716 reaction equation
[Si:1]([O:8][CH2:9][CH2:10][O:11][NH:12][C:13](=[O:33])[C:14]1[CH:19]=[C:18]([CH:20]=C)[C:17]([F:22])=[C:16]([F:23])[C:15]=1[NH:24][C:25]1[CH:30]=[CH:29][C:28]([I:31])=[CH:27][C:26]=1[F:32])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].I([O-])(=O)(=O)=[O:35].[Na+]>C1COCC1.O.[Os](=O)(=O)(=O)=O>[Si:1]([O:8][CH2:9][CH2:10][O:11][NH:12][C:13](=[O:33])[C:14]1[CH:19]=[C:18]([CH:20]=[O:35])[C:17]([F:22])=[C:16]([F:23])[C:15]=1[NH:24][C:25]1[CH:30]=[CH:29][C:28]([I:31])=[CH:27][C:26]=1[F:32])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 2

HCID 23132384N-[2-(t-Butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-vinyl-benzamideHCID 23667635Sodium periodate

Product 1

HCID 23132329N-[2-(t-butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-formyl-benzamideYield 51%

Reagents, catalysts & solvents 3

HCID 30318Osmium TetroxideCatalyst
HCID 962
Water
Solvent
HCID 8028TetrahydrofuranSolvent

Procedure

N-[2-(t-Butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-vinyl-benzamide (6.35 g, 10.7 mmol) prepared in Process A was dissolved in a mixed solvent of THF (100 ml) and water (30 ml). Aqueous solution of osmium tetroxide (0.1 mM, 2 ml, 0.2 mmol), and sodium metaperiodate (9.0 g, 42.1 mmol) were added at 10° C., and the mixture was stirred at room temperature for 17 hours. Insoluble material was removed through a celite column, and the solution was extracted with ethyl acetate. The extract was washed successively with water and saturated brine, the organic layer was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (300 g, n-hexane/ethyl acetate (5:1)) to give N-[2-(t-butyldimethylsilanyloxy)-ethoxy]-3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-5-formyl-benzamide (3.24 g, 51%) as a brown solid.

Workup

  1. customInsoluble material was removed through a celite column
  2. extractionthe solution was extracted with ethyl acetate
  3. washThe extract was washed successively with water and saturated brine
  4. dry with materialthe organic layer was dried over anhydrous sodium sulfate
  5. distillationthe solvent was distilled off under reduced pressure
  6. customThe residue was purified by silica gel chromatography (300 g, n-hexane/ethyl acetate (5:1))

Sources & evidence

ORD record
ord-77f8f3dab5dc432c88308767cb2f8854
Source dataset
uspto-grants-2011_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08084645B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes