Potassium Fluoride → (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2-fluoro-6-methylpyrimidin-4-yl)oxazolidin-2-one

HRID 57355Notes

Reaction equation

[F-:1].[K+].[C:3]([O:7][C@@H:8]([C@H:10]1[CH2:14][O:13][C:12](=[O:15])[N:11]1[C:16]1[CH:21]=[C:20]([CH3:22])[N:19]=[C:18](Cl)[N:17]=1)[CH3:9])([CH3:6])([CH3:5])[CH3:4]>CS(C)=O.C(OCC)(=O)C.O>[C:3]([O:7][C@@H:8]([C@H:10]1[CH2:14][O:13][C:12](=[O:15])[N:11]1[C:16]1[CH:21]=[C:20]([CH3:22])[N:19]=[C:18]([F:1])[N:17]=1)[CH3:9])([CH3:6])([CH3:5])[CH3:4]

Participants

Conditions

Temperature: 120 °C

Procedure

Potassium fluoride (0.063 g, 1.08 mmol, 10 equiv) was added to a solution of (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2-chloro-6-methylpyrimidin-4-yl)oxazolidin-2-one (34 mg, 0.108 mmol) in DMSO (1.1 mL). The suspension was heated at 120° C. for 3 hours and then cooled to room temperature. The reaction was diluted with ethyl acetate (20 mL) and water (20 mL). The layers were separated and the aqueous layer was extracted with ethyl acetate (20 mL). The combined organic layers were dried over Na2SO4, filtered and concentrated to give crude (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2-fluoro-6-methylpyrimidin-4-yl)oxazolidin-2-one, which was used without further purification. 1H NMR (400 MHz, CDCl3) δ 7.99 (d, J=3.8 Hz, 1H), 4.71 (m, 1H), 4.65 (m, 1H), 4.46 (m, 1H), 4.41 (m, 1H), 2.53 (s, 3H), 1.25 (s, 9H), 1.03 (d, J=6.5 Hz, 3H); MS m/z 298.2 (M+H)+; Rt-0.96 min.

Workup

temperaturecooled to room temperature
customThe layers were separated
extractionthe aqueous layer was extracted with ethyl acetate (20 mL)
dry with materialThe combined organic layers were dried over Na2SO4
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-d407e169777347ecab5b4db92a94ab1a
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09434719B2

Reaction notes

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