Hydrogen Peroxide → 1-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-ethane-1,2-diol

HRID 2104056Notes

Reaction equation

HRID 2104056 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([CH:19]([OH:28])[CH2:20][Si](OC(C)C)(C)C)=[CH:11][C:12]3[NH:16][CH:15]=[N:14][C:13]=3[C:17]=2[F:18])=[C:4]([Cl:29])[CH:3]=1.[F-].[K+].[OH:32]O>CO.C1COCC1.O>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([CH:19]([OH:28])[CH2:20][OH:32])=[CH:11][C:12]3[NH:16][CH:15]=[N:14][C:13]=3[C:17]=2[F:18])=[C:4]([Cl:29])[CH:3]=1

Participants

6

Reactant 3

HCID 784Hydrogen PeroxideHCID 522689Potassium FluorideHCID 211141671-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-2-(isopropoxy-dimethyl-silanyl)-ethanol

Product 1

HCID 211141701-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-ethane-1,2-diolYield 34%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21899815MeOH tetrahydrofuranSolvent

Procedure

To the crude 1-[6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3H-benzoimidazol-5-yl]-2-(isopropoxy-dimethyl-silanyl)-ethanol 10v in MeOH-THF (5 mL-5 mL) is added KHCO3 (54 mg, 0.54 mmol), and KF (74 mg, 1.27 mmol), and 30% aqueous H2O2 (0.20 mL) at room temperature. After stirring for 3.5 hours at room temperature, the reaction mixture is diluted with water, and extracted with EtOAc. The organic layer is dried over MgSO4, filtered, concentrated in vacuo, and purified by flash chromatography (8% to 10% MeOH in CH2Cl2) to give the desired product (74 mg, 34%): MS APCI (+) m/z 400, 402 (M+, Br pattern) detected; 1H NMR (400 MHz, CD3OD) δ 8.20 (s, 1H), 7.62 (broad s, 1H), 7.47 (d, 1H), 7.14 (dd, 1H), 6.30 (d, 1H), 4.96 (t, 1H), 3.64 (m, 2H); 19F NMR (376 MHz, CD3OD) −136.87 (s).

Workup

  1. extractionextracted with EtOAc
  2. dry with materialThe organic layer is dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. custompurified by flash chromatography (8% to 10% MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-ecf0c9fbf19643389167ce050f9fb6dd
Source dataset
uspto-grants-2009_08
Patent number
US07576114B2

Reaction notes

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