efficient iodide-catalyzed/hydrogen peroxide mediated sulfenylation and selenylation of unprotected uracil and its derivatives with simple thiols and diselenides was established. This coupling tolerates a broad variety of functional groups to provide diverse 5-sulfur/selenium-substituted uracilderivatives in good to excellent yields (up to 93%).
A recyclable iron/graphite (Fe/Cg) catalyst for the efficientC-S cross-coupling of various iodoarenes with aromatic/ aliphatic thiols has been developed under ligand-free conditions (26 examples, up to 99% yield). The catalyst can be easily recovered and recycled up to seven cycles without loss of activity.