Remarkable progress has been made on chelation-assisted α and β C–H functionalization of aryl alkenes; however, there is no report on C–H allylation reactions. This work focuses on the first α and β C–H allylation of aryl alkenes using allyl carbonates to produce linear and branched 1,4-dienes enabled by chelation-assistance of pyridine-2-carboxamide, simply performed with Pd(OAc)₂/AcOH in ethanol. This operationally simple protocol exhibited wide functionality tolerance and broad substrate scope and enabled successful gram-scaled preparation.

中文翻译：

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钯催化芳基烯烃的 α 和 β C-H 烯丙基化

芳基烯烃的螯合辅助α和βC-H官能化研究取得了显着进展；然而，目前还没有关于C-H烯丙基化反应的报道。这项工作的重点是使用碳酸烯丙酯对芳基烯烃进行首次 α 和 β C-H 烯丙基化，通过吡啶-2-甲酰胺的螯合辅助生成直链和支链 1,4-二烯，只需使用 Pd(OAc) ₂ / AcOH 的乙醇溶液。这种操作简单的方案表现出广泛的功能耐受性和广泛的底物范围，并能够成功进行克级制备。