Sodium Thiosulfate Pentahydrate → 1-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy-ethanone

HRID 32011

Reaction equation

HRID 32011 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([CH:20]([OH:26])[CH2:21][O:22][CH2:23][O:24][CH3:25])=[CH:11][C:12]3[N:16]([CH3:17])[CH:15]=[N:14][C:13]=3[C:18]=2[F:19])=[C:4]([Cl:27])[CH:3]=1.CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O.C([O-])(O)=O.[Na+].O.O.O.O.O.S([O-])([O-])(=O)=S.[Na+].[Na+]>C(Cl)Cl.CCOCC.CCOC(C)=O>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[C:10]([C:20](=[O:26])[CH2:21][O:22][CH2:23][O:24][CH3:25])=[CH:11][C:12]3[N:16]([CH3:17])[CH:15]=[N:14][C:13]=3[C:18]=2[F:19])=[C:4]([Cl:27])[CH:3]=1

Participants

8

Reactant 4

HCID 61475Sodium Thiosulfate PentahydrateHCID 159087TriacetoxyperiodinaneHCID 516892Sodium BicarbonateHCID 211141711-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy-ethanol

Product 1

HCID 211141721-[6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy-ethanoneYield 71%

Reagents, catalysts & solvents 3

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 1-[6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazol-5-yl]-2-methoxymethoxy-ethanol 10i (44 mg, 0.096 mmol) and the Dess-Martin periodinane (49 mg, 0.12 mmol) in CH2Cl2 (1.5 mL) is stirred for 1.5 hours at room temperature. The reaction mixture is diluted with ether (3 mL). Saturated aqueous NaHCO3 (1 mL) containing sodium thiosulfate pentahydrate (74 mg) is added. The resulting mixture is stirred for 10 minutes and diluted with EtOAc. The organic layer is washed with saturated aqueous NaHCO3 and brine, dried over MgSO4, filtered, and concentrated in vacuo to give a crude material which is purified by flash chromatography (1.5% MeOH in CH2Cl2) to afford the desired product (31 mg, 71%): MS APCI (+) m/z 456, 458 (M+, Br pattern) detected.

Workup

  1. additionis added
  2. washThe organic layer is washed with saturated aqueous NaHCO3 and brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customto give a crude material which
  7. customis purified by flash chromatography (1.5% MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-e9c32509e51d4cc49e566892f3e4e21e
Source dataset
uspto-grants-2008_09
Patent number
US07425637B2

Linked notes

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