Ethyl Acetate → HCID 10151302, compound

Participants

Reaction Steps

(5R)-3-[4-(1,1-Dioxo-3,6-dihydro-2H-thiopyran-4-yl)-3-fluorophenyl]-5-(azidomethyl)oxazolidin-2-one (6.9 g, 18.83 mmol) (Reference Example 2) was dissolved in dry 1,4-dioxane (15 ml), 2-propynoic acid t-butylester (4.75 g, 37.67 mmol) was added and the resulting mixture was refluxed for 12 hours under vigorous stirring. Ethyl acetate (30 ml) was added and the resulting precipitate was filtered, washed with ethyl acetate and dried as a white solid (5 g). This solid was suspended in dichloromethane (16 ml), followed by drop wise addition of trifluoroacetic acid (8 ml) and the resulting mixture was stirred over night. The solvent was removed under vacuum and the residue was purified by precipitation from dichloromethane to give the title product as an off-white solid (3.3 g).

Provenance & Evidence