Lawesson's reagent → N-[[(5S)-3-[3-fluoro-4-(tetrahydro-1,1-dioxido-2H-1,2-thiazin-4-yl)phenyl]-2-oxo-5-oxazolidinyl]methyl]ethanethioamide

Participants

Reaction Steps

N-[[(5S)-3-[3-Fluoro-4-(tetrahydro-1,1-dioxido-2H-1,2-thiazin-4-yl)phenyl]-2-oxo-5-oxazolidinyl]methyl]acetamide (180 mg, 0.47 mmol), Lawesson's Reagent (310 mg, 0.77 mmol) and dioxane (10 ml) are heated under reflux for 1 hr. After cooling, the solvent is evaporated and the residue chromatographed over silica gel (40 g) eluting with 2-4% methanol-chloroform gives the title compound as a foam (173 mg, 92%). HRMS(FAB): calcd for m+H=402.0957; Found: 402.0954.

Provenance & Evidence