Methyl iodide → (S)-4-Benzyl-3-((S)-2-(4-fluorophenyl)propanoyl)oxazolidin-2-one

HRID 1853102Notes

Reaction equation

[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:23])[CH2:15][C:16]1[CH:21]=[CH:20][C:19]([F:22])=[CH:18][CH:17]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.IC.[CH3:26][Si]([N-][Si](C)(C)C)(C)C.[Na+]>C1COCC1>[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:23])[C@H:15]([C:16]1[CH:17]=[CH:18][C:19]([F:22])=[CH:20][CH:21]=1)[CH3:26])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: -78 °C

Procedure

To a room-temperature solution of (S)-4-benzyl-3-(2-(4-fluorophenyl)acetyl)oxazolidin-2-one (5.1 g, 16.3 mmol, 1.0 equiv) in dry THF (100 mL) was added iodomethane (1.0 mL, 16.2 mmol, 1.0 equiv) by syringe. The resulting mixture was cooled to −78° C., and NaHMDS (8.15 mL, 2M in THF, 16.3 mmol, 1.0 equiv) was added dropwise by syringe. After stirring for 15 minutes at −78° C., the reaction mixture was allowed to warm to room temperature. The reaction was quenched with saturated. aq. NH4Cl, and diluted with EtOAc. The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated in vacuo. Purification by silica gel chromatography (7-20% EtOAc/hexanes) provided the title compound (2.6 g, 49%).

Workup

temperatureto warm to room temperature
customThe reaction was quenched with saturated
additionaq. NH4Cl, and diluted with EtOAc
washThe organic layer was washed with brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customPurification by silica gel chromatography (7-20% EtOAc/hexanes)

Sources & evidence

ORD record: ord-83c4fb231bbe4543bfb9216250a70dc7
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08962632B2

Reaction notes

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