Iodine → (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[2-iodo-5-(trifluoromethoxy)benzyl]-4-methyl-1,3-oxazolidin-2-one

HRID 1028598Notes

Reaction equation

HRID 1028598 reaction equation
N[C:2]1[CH:29]=[CH:28][C:27]([O:30][C:31]([F:34])([F:33])[F:32])=[CH:26][C:3]=1[CH2:4][N:5]1[C@@H:9]([CH3:10])[C@@H:8]([C:11]2[CH:16]=[C:15]([C:17]([F:20])([F:19])[F:18])[CH:14]=[C:13]([C:21]([F:24])([F:23])[F:22])[CH:12]=2)[O:7][C:6]1=[O:25].N(OC(C)(C)C)=O.[I:42]I>C(Cl)(Cl)Cl.CCOC(C)=O>[F:22][C:21]([F:24])([F:23])[C:13]1[CH:12]=[C:11]([C@H:8]2[O:7][C:6](=[O:25])[N:5]([CH2:4][C:3]3[CH:26]=[C:27]([O:30][C:31]([F:34])([F:33])[F:32])[CH:28]=[CH:29][C:2]=3[I:42])[C@H:9]2[CH3:10])[CH:16]=[C:15]([C:17]([F:20])([F:19])[F:18])[CH:14]=1

Participants

6

Reactant 3

HCID 807IodineHCID 10906Tert-Butyl nitriteHCID 57617867(4S,5R)-3-[2-amino-5-(trifluoromethoxy)benzyl]-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one

Product 1

HCID 86603425(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[2-iodo-5-(trifluoromethoxy)benzyl]-4-methyl-1,3-oxazolidin-2-one

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (4S,5R)-3-[2-amino-5-(trifluoromethoxy)benzyl]-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one (582 mg, 1.16 mmol) in CHCl3 (35 mL) was added t-butyl nitrite (275 μL, 2.32 mmol). After 10 minutes, I2 (736 mg, 2.9 mmol) was added. The reaction was stirred at room temperature for 30 minutes, and then heated to 65° C. for 2 hours. The reaction was then cooled to room temperature, diluted with EtOAc (150 mL) and washed with aqueous NaHSO3, water, brine, saturated NaHCO3, and brine (50 mL each). The organic layer was dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel (2 to 15% EtOAc/hexanes) afforded (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[2-iodo-5-(trifluoromethoxy)benzyl]-4-methyl-1,3-oxazolidin-2-one. Rf=0.30 (15% EtOAc/hexanes). LCMS=614.1 (M+1)+. 1H NMR (CDCl3, 500 MHz) δ 7.89-7.91 (m, 2H), 7.79 (s, 2H), 7.23 (m, 1H), 6.95 (m, 1H), 5.75 (d, J=8.0 Hz, 1H), 4.81 (d, J=15.8 Hz, 1H), 4.32 (d, J=15.8 Hz, 1H), 4.07 (m, 1H), 0.78 (d, J=6.6 Hz, 3H).

Workup

  1. temperatureheated to 65° C. for 2 hours
  2. temperatureThe reaction was then cooled to room temperature
  3. washwashed with aqueous NaHSO3, water, brine, saturated NaHCO3, and brine (50 mL each)
  4. dry with materialThe organic layer was dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customPurification of the residue by flash chromatography on silica gel (2 to 15% EtOAc/hexanes)

Sources & evidence

ORD record
ord-758408f541a1403c87d35d7cbcacf110
Source dataset
uspto-grants-2014_05
Patent number
US08735435B2

Reaction notes

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