A highly efficient and straightforward approach has been developed for selective intramolecular radical cyclization of arylsulfinic acids with o-(allyloxy)arylaldehydes, o-(homoallyloxy)arylaldehydes and (but-3-en-1-yloxy)benzenes. This photoinduced reaction generated sulfone-functionalized chroman-4-ones and chromans in good to excellent yields under simple and mild conditions without an external photocatalyst.

中文翻译：

---

在无过渡金属条件下通过可见光诱导的级联自由基环化反应合成砜官能化的苯并四氢吡喃和苯并二氢吡喃

已经开发出一种高效且直接的方法，用于将芳基亚磺酸与邻-（烯丙氧基）芳醛，邻-（烯丙氧基）芳醛和（丁-3-烯-1-基氧基）苯进行选择性分子内自由基环化。这种光诱导的反应在没有外部光催化剂的情况下，在简单温和的条件下生成了砜官能化的苯并四氢吡喃和苯并二氢吡喃，收率好至极好。