反应详情

To a solution of (4R)-4-(hydroxymethyl)-5-(1-hydroxypropan-2-yl)oxazolidin-2-one (1.0 equiv.) in pyridine (0.15 M) at 0° C. was added p-toluenesulfonylchloride (2.1 equiv.). The solution was allowed to warm to rt as it stirred for 14 hours, at which time EtOAc was added and the solution was washed with H2O(3×), CuSO4(sat.) (2×), H2O, Na2CO3(sat.) and NaCl(sat.), dried over MgSO4, filtered, concentrated and purified by silica gel chromatography (75% EtOAc/hexanes eluent) yielding 2-((4R)-2-oxo-4-(tosyloxymethyl)oxazolidin-5-yl)propyl 4-methylbenzenesulfonate (68%). LCMS (m/z): 484.1 (MH+); LC Rt=4.06 min.

1. additionwas added
2. washthe solution was washed with H2O(3×), CuSO4(sat.) (2×), H2O, Na2CO3(sat.) and NaCl(sat.)
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. custompurified by silica gel chromatography (75% EtOAc/hexanes eluent)