N-Iodosuccinimide → Compound 3

HRID 2402974Notes

Reaction equation

HRID 2402974 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([N:8]2[CH2:12][C@H:11]([CH2:13][OH:14])[O:10][C:9]2=[O:15])[CH:5]=[CH:6][CH:7]=1.[I:16]N1C(=O)CCC1=O>FC(F)(F)C(O)=O>[F:1][C:2]1[CH:3]=[C:4]([N:8]2[CH2:12][C@H:11]([CH2:13][OH:14])[O:10][C:9]2=[O:15])[CH:5]=[CH:6][C:7]=1[I:16]

Participants

4

Reactant 2

HCID 120273N-IodosuccinimideHCID 11229590(R)-3-(3-Fluorophenyl)-5-(hydroxymethyl)oxazolidin-2-one

Product 1

HCID 20788885Compound 3Yield 88%

Reagents, catalysts & solvents 1

HCID 6422Trifluoroacetic acidSolvent

Conditions

Temperature
25 °C

Procedure

A solution of (5R)-(3-(3-fluoro-phenyl)-5-hydroxymethyl-oxazolidin-2-one (1018, 10.74 g, 50.9 mmol) in trifluoroacetic acid (TFA, 50 mL) was treated with N-iodosuccinimide (NIS, 12.03 g, 53.45 mmol, 1.05 equiv) at 25° C., and the resulting reaction mixture was stirred at 25° C. for 2 h. When TLC and HPLC/MS showed that the reaction was complete, the reaction mixture was concentrated in vacuo. The residue was then treated with H2O (100 mL) and 20% EtOAc-hexane (100 mL) at 25° C., and the resulting mixture was stirred at 25° C. for 30 min before being cooled down to 0-5° C. for 2 h. The white solids were collected by filtration, washed with H2O (2×25 mL) and 20% EtOAc-hexane (2×25 mL), and dried in vacuo to afford the crude, desired (5R)-3-(3-fluoro-4-iodo-phenyl)-5-hydroxymethyl-oxazolidin-2-one (1019, 15.1 g, 17.15 g theoretical, 88%) as off-white powders, which were found to be essentially pure and was directly used in the subsequent reactions without further purifications. For 1019: 1H NMR (300 MHz, DMSO-d6) δ 3.58 (dd, 1H, J=4.2, 12.6 Hz), 3.67 (dd, 1H, J=3.0, 12.6 Hz), 3.67 (dd, 1H, J=6.3, 9.0 Hz), 4.07 (t, 1H, J=9.0 Hz), 4.72 (m, 1H), 5.21 (br. s, 1H, OH), 7.22 (dd, 1H, J=2.4, 8.4 Hz), 7.58 (dd, 1H, J=2.4, 11.1 Hz), 7.81 (dd, 1H, J=7.8, 8.7 Hz); C10H9FINO3, LCMS (EI) m/e 338 (M++H).

Workup

  1. customthe resulting reaction mixture
  2. concentrationthe reaction mixture was concentrated in vacuo
  3. additionThe residue was then treated with H2O (100 mL) and 20% EtOAc-hexane (100 mL) at 25° C.
  4. stirringthe resulting mixture was stirred at 25° C. for 30 min
  5. temperaturebefore being cooled down to 0-5° C. for 2 h
  6. filtrationThe white solids were collected by filtration
  7. washwashed with H2O (2×25 mL) and 20% EtOAc-hexane (2×25 mL)
  8. customdried in vacuo

Sources & evidence

ORD record
ord-092877d0d50d46c78a0123e585ef1152
Source dataset
uspto-grants-2014_08
Patent number
US08796465B2

Reaction notes

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