The visible light and Eosin B-catalyzed direct sulfenylation of sp² C–H bonds with sulfinic acids through a photoredox process has been demonstrated at room temperature under transition metal-free conditions for the first time. Diverse heteroaryl sulfides were obtained in moderate to good yields. This is the first example of the sulfenylation of sp² C–H bonds using arylsulfinic acids as odorless sulfur reagents under visible light-induced conditions. More interestingly, the reductive products could be obtained under visible light-induced oxidative conditions. This protocol demonstrates a new model for C–S bond formation, which serves as a novel approach toward the synthesis of heteroaryl sulfides.

中文翻译：

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亚磺酸使可见光诱导的CH H亚磺酰化

首次在室温下，无过渡金属的条件下，证明了可见光和曙红B催化的亚砜酸通过光氧化还原过程使sp ² C–H键与亚磺酸发生直接亚磺基化反应。以中等至良好的产率获得了多种杂芳基硫化物。这是在可见光诱导的条件下，使用芳基亚磺酸作为无味硫试剂对sp ² C–H键进行亚磺酰基化的第一个例子。更有趣的是，可以在可见光诱导的氧化条件下获得还原产物。该协议展示了一个用于C–S键形成的新模型，该模型为合成杂芳基硫醚提供了一种新颖的方法。