Water → (R)-3-[3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]-5-(4-trifluoromethoxyphenyl)-3H-[1,3,4]oxadiazol-2-one

HRID 856352Notes

Reaction equation

HRID 856352 reaction equation
[F:1][C:2]([F:17])([F:16])[O:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]2[O:14][C:13](=[O:15])[NH:12][N:11]=2)=[CH:6][CH:5]=1.[Cl:18][C:19]1[N:20]([CH2:27][C@:28]2([CH3:31])[CH2:30][O:29]2)[CH:21]=[C:22]([N+:24]([O-:26])=[O:25])[N:23]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C=O)C>[Cl:18][C:19]1[N:20]([CH2:27][C@:28]([OH:29])([CH3:30])[CH2:31][N:12]2[N:11]=[C:10]([C:7]3[CH:6]=[CH:5][C:4]([O:3][C:2]([F:1])([F:16])[F:17])=[CH:9][CH:8]=3)[O:14][C:13]2=[O:15])[CH:21]=[C:22]([N+:24]([O-:26])=[O:25])[N:23]=1

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 10443353(R)-2-chloro-1-(2-methyloxiran-2-ylmethyl)-4-nitroimidazoleHCID 230813495-(4-trifluoromethoxyphenyl)-3H-[1,3,4]oxadiazol-2-one

Product 1

HCID 69481895(R)-3-[3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]-5-(4-trifluoromethoxyphenyl)-3H-[1,3,4]oxadiazol-2-oneYield 99.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 5-(4-trifluoromethoxy-phenyl)-3H-[1,3,4]oxadiazol-2-one (0.68 g, 2.76 mmol) and (R)-2-chloro-1-(2-methyloxiran-2-ylmethyl)-4-nitroimidazole prepared in Example 12 (0.50 g, 2.30 mmol) in DMF (5 ml), potassium carbonate (0.38 g, 2.76 mmol) was added followed by stirring at room temperature for 16 hours, and then water was added. The solution was extracted with ethyl acetate, dried over magnesium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (methylene chloride/ethyl acetate=4/1) to afford (R)-3-[3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl]-5-(4-trifluoromethoxyphenyl)-3H-[1,3,4]oxadiazol-2-one (1.06 g, quantitative yield) as a white amorphous form.

Workup

  1. extractionThe solution was extracted with ethyl acetate
  2. dry with materialdried over magnesium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was purified by silica gel column chromatography (methylene chloride/ethyl acetate=4/1)

Sources & evidence

ORD record
ord-949fe28f32954dbf8e2722fc303d814f
Source dataset
uspto-grants-2007_08
Patent number
US07262212B2

Reaction notes

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