Radical-initiated allylation reactions represent a powerful tool for installation of a synthetically useful allyl group for further transformations. In this field, direct allylation of C–H bonds has received considerable attention due to its high atom-efficiency and environmentally benign nature. Despite these advancements, the current strategies still have some limitations, such as the utilization of stoichiometric HAT reagents and excessive amounts of C–H substrates, incompatibility with aldehydic C(sp²)–H bonds, and reliance on dual catalysis or multiple steps. Herein, a one-step protocol for desulfonylative allylation of C–H bonds of aldehydes and alkanes with allyl sulfones using TBADT as a photo-hydrogen atom transfer catalyst is reported. This methodology requires only a single equivalent of C–H substrates and has been applied for the allylation of aldehydic C(sp²)–H and activated or unactivated aliphatic C(sp³)–H with good functional group tolerance. Moreover, this methodology exhibits further application potential for diacrylation of allylic sulfones by slightly adjusting the ratio of reactants, presenting a direct and facile access to highly substituted 1,5-diketones in good to high yields.

中文翻译：

---

使用醛/烷烃和烯丙基砜的十钨酸盐介导的脱磺酰化烯丙基化和双丙烯酸化

自由基引发的烯丙基化反应是安装合成有用的烯丙基以进行进一步转化的有力工具。在这一领域，C-H键的直接烯丙基化由于其高原子效率和环境友好性而受到相当大的关注。尽管取得了这些进步，但目前的策略仍然存在一些局限性，例如使用化学计量的 HAT 试剂和过量的 C-H 底物，与醛 C(sp ²)–H 键，以及对双催化或多步骤的依赖。在此，报道了使用 TBADT 作为光氢原子转移催化剂对醛和烷烃的 C-H 键与烯丙基砜进行脱磺酰化烯丙基化的一步方案。该方法仅需要单一当量的 C-H 底物，并已应用于醛基 C(sp ² )-H 和活化或未活化的脂肪族 C(sp ³ )-H 的烯丙基化反应，具有良好的官能团耐受性。此外，该方法通过稍微调整反应物的比例，展示了对烯丙基砜二丙烯酸酯化的进一步应用潜力，提供了一种直接和容易地以良好到高收率获得高度取代的 1,5-二酮的方法。