In contrast to hypervalent iodine compounds, the chemistry of their sulfur analogues has been considerably less explored. Herein, we report the direct C–H bond thiolation of electron-rich heterocycles, arenes, and 1,3-dicarbonyls by dichlorosulfuranes under mild conditions. Mechanistic studies and density functional theory calculations suggest the radical chain mechanism of the disclosed transformation. The key to success is attributed to a strikingly low S–Cl bond dissociation energy, which enables the generation of radical species upon exposure to daylight.

中文翻译：

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高价硫衍生物作为磺化试剂：可见光介导的活化 C(sp2)–H 键与二卤代硫醚的直接硫醇化


与高价碘化合物相比，人们对它们的硫类似物的化学性质的研究要少得多。在此，我们报道了在温和条件下二氯硫醚对富电子杂环、芳烃和 1,3-二羰基的直接 C-H 键硫醇化。机理研究和密度泛函理论计算表明了所公开的转化的根本链机制。成功的关键在于 S-Cl 键解离能极低，这使得暴露在日光下时能够产生自由基物质。