Nitric Acid → (4R,5R)-3-[3,5-bis(trifluoromethyl)benzyl]-5-[2-iodo-3-nitro-5-(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one

HRID 1028677Notes

Reaction equation

HRID 1028677 reaction equation
[F:1][C:2]([F:33])([F:32])[C:3]1[CH:4]=[C:5]([CH:25]=[C:26]([C:28]([F:31])([F:30])[F:29])[CH:27]=1)[CH2:6][N:7]1[C@H:11]([CH3:12])[C@@H:10]([C:13]2[CH:18]=[C:17]([C:19]([F:22])([F:21])[F:20])[CH:16]=[CH:15][C:14]=2[I:23])[O:9][C:8]1=[O:24].[N+:34]([O-])([OH:36])=[O:35].O>CCOC(C)=O>[F:33][C:2]([F:1])([F:32])[C:3]1[CH:4]=[C:5]([CH:25]=[C:26]([C:28]([F:30])([F:29])[F:31])[CH:27]=1)[CH2:6][N:7]1[C@H:11]([CH3:12])[C@@H:10]([C:13]2[CH:18]=[C:17]([C:19]([F:20])([F:21])[F:22])[CH:16]=[C:15]([N+:34]([O-:36])=[O:35])[C:14]=2[I:23])[O:9][C:8]1=[O:24]

Participants

5

Reactant 3

HCID 944Nitric AcidHCID 962WaterHCID 59135170(4R,5R)-3-[3,5-Bis(trifluoromethyl)benzyl]-5-[2-iodo-5-(trifluoromethyl)phenyl)-4-methyl-1,3-oxazolidin-2-one

Product 1

HCID 59135110(4R,5R)-3-[3,5-bis(trifluoromethyl)benzyl]-5-[2-iodo-3-nitro-5-(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

(4R,5R)-3-[3,5-Bis(trifluoromethyl)benzyl]-5-[2-iodo-5-(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one was added in portions to 2 mL of fuming nitric acid at 0° C. The reaction mixture was stirred overnight at r.t., and then heated to 75° C. for 4 h. The reaction mixture was cooled and then added dropwise to a rapidly stirred mixture of 10 mL of water and 10 mL of EtOAc. The phases were separated and the organic phase was washed with 10 mL each of saturated NaHCO3 and brine, dried (Na2SO4), and concentrated. The residue was purified by flash chromatography on a Biotage Horizon, 25S column, eluting with 1 CV of 5% EtOAc in hexanes followed by a linear gradient of 5→100% EtOAc in hexanes over 10 CV, to provide the title compound. Mass spectrum (ESI) 643 (M+1).

Workup

  1. temperatureheated to 75° C. for 4 h
  2. temperatureThe reaction mixture was cooled
  3. customThe phases were separated
  4. washthe organic phase was washed with 10 mL each of saturated NaHCO3 and brine
  5. dry with materialdried (Na2SO4)
  6. concentrationconcentrated
  7. customThe residue was purified by flash chromatography on a Biotage Horizon, 25S column
  8. washeluting with 1 CV of 5% EtOAc in hexanes

Sources & evidence

ORD record
ord-a2e7e791210744f99be9eef82936bdd8
Source dataset
uspto-grants-2014_05
Patent number
US08735435B2

Reaction notes

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