反应详情

To a round bottom flask containing (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(2,6-dichloropyrimidin-4-yl)oxazolidin-2-one (1 g, 2.99 mmol) was added DCM (7.5 mL) followed by the addition of TFA (7.5 mL). The resulting homogenous reaction mixture allowed to stir 1 hr at room temperature. The volatiles were then removed. Residue dissolved in DCM and neutralized with a saturated solution of NaHCO3. The phases were partioned, the aqueous phase extracted with DCM. Organic phases combined, washed with water, brine, dried (Na2SO4), filtered and concentrated to a white foam of (R)-3-(2,6-dichloropyrimidin-4-yl)-4-((R)-1-hydroxyethyl)oxazolidin-2-one (737 mg, 2.65 mmol, 89% yield). 1H NMR (400 MHz, CDCl3) δ 1.19 (d, J=6.46 Hz, 3H) 4.47 (dd, J=9.37, 8.53 Hz, 1H) 4.55 (quin, J=5.69 Hz, 1H) 4.63 (dd, J=9.49, 2.79 Hz, 1H) 4.89 (ddd, J=8.19, 4.96, 2.79 Hz, 1H) 8.24 (s, 1H). LCMS m/z 278.0 (M+H)+, Rt 0.66 min.

1. customThe volatiles were then removed
2. dissolutionResidue dissolved in DCM
3. extractionthe aqueous phase extracted with DCM
4. washwashed with water, brine
5. dry with materialdried (Na2SO4)
6. filtrationfiltered