Trifluoroacetic acid → 3,4-Difluoro-2-[(2-Fluoro-4-Iodophenyl)amino]-N-(2-Hydroxyethoxy)-5-[(2-Hydroxyethoxy)methyl]benzamide

HRID 2038600Notes

Reaction equation

HRID 2038600 reaction equation
[O:1]1[CH2:5][CH2:4][O:3][CH:2]1[C:6]1[C:7]([F:29])=[C:8]([F:28])[C:9]([NH:19][C:20]2[CH:25]=[CH:24][C:23]([I:26])=[CH:22][C:21]=2[F:27])=[C:10]([CH:18]=1)[C:11]([NH:13][O:14][CH2:15][CH2:16][OH:17])=[O:12].[BH4-].[Na+].FC(F)(F)C(O)=O.C(=O)(O)[O-].[Na+]>C1COCC1>[F:28][C:8]1[C:9]([NH:19][C:20]2[CH:25]=[CH:24][C:23]([I:26])=[CH:22][C:21]=2[F:27])=[C:10]([CH:18]=[C:6]([CH2:2][O:1][CH2:5][CH2:4][OH:3])[C:7]=1[F:29])[C:11]([NH:13][O:14][CH2:15][CH2:16][OH:17])=[O:12]

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 593480285-[1,3]dioxolan-2-yl-3,4-difluoro-2-(2-fluoro-4-iodo-phenylamino)-N-(2-hydroxy-ethoxy)-benzamide

Product 1

HCID 115337913,4-Difluoro-2-[(2-Fluoro-4-Iodophenyl)amino]-N-(2-Hydroxyethoxy)-5-[(2-Hydroxyethoxy)methyl]benzamideYield 80%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 5-[1,3]dioxolan-2-yl-3,4-difluoro-2-(2-fluoro-4-iodo-phenylamino)-N-(2-hydroxy-ethoxy)-benzamide (21.69 g) obtained in Step G in anhydrous THF (100 ml) were added sodium borohydride (4.21 g, 111.4 mmol) and trifluoroacetic acid (5.08 ml, 66.8 mmol) with ice-cooling, and the mixture was stirred at room temperature overnight. The reaction mixture was poured into saturated aqueous sodium bicarbonate, and extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium bicarbonate and saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (SiO2 600 g, 100% AcOEt to AcOEt/MeOH (50:1 to 20:1)) to give 3,4-difluoro-2-(2-fluoro-4-iodo-phenylamino)-N-(2-hydroxy-ethoxy)-5-(2-hydroxy-ethoxymethyl)-benzamide (13.9 g, 80%) as a white powder.

Workup

  1. temperaturecooling
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with saturated aqueous sodium bicarbonate and saturated brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (SiO2 600 g, 100% AcOEt to AcOEt/MeOH (50:1 to 20:1))

Sources & evidence

ORD record
ord-340d6b17e61540ed8c71642183724068
Source dataset
uspto-grants-2013_11
Patent number
US08575391B2

Reaction notes

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