Abstract
AbstractWe report a direct synthesis of 2‐thioxooxazolidin‐4‐ones and oxazolidine‐2,4‐diones from α‐keto thioesters with sodium thiocyanate or potassium cyanate, respectively. The reactions proceed through nucleophilic substitution of a thioester with thiocyanate/cyanate anion, thiolate anion addition to carbonyl carbon, and subsequent intramolecular C−O heterocyclization.magnified image
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