efficient one-potthree-component palladium-catalyzed domino reaction of aryl iodide, 2-bromophenylboronic acid, and norbornadiene to produce phenanthrenes has been developed. Norbornadiene serves both as the activator of ortho-C–H bond and the source of ethylene via a retro-Diels–Alder reaction. The method features inexpensive and readily available substrates, a broad range of functional groups, and
Palladium-Catalyzed Decarboxylative Annulation Reaction of Aryl Iodides and Methyl 2-Haloarenecarboxylates
作者:Ying Fu、Xi Chen、Hao Chen、Jia-Jia Liu、Zhengyin Du
DOI:10.1021/acs.orglett.4c01484
日期:2024.6.28
A ligand-free palladium-catalyzed and norbornadiene-mediated annulation reaction of iodoarenes with methyl 2-haloarenecarboxylates is reported. The sequentially accomplished reaction comprises intermolecular C–H arylation, followed by intramolecular decarboxylative annulation, affording various valuable phenanthrenes. This reaction protocol could be expanded to triphenylene syntheses whereby norbornene
报道了碘芳烃与 2-卤代芳烃甲酸甲酯的无配体钯催化和降冰片二烯介导的环化反应。随后完成的反应包括分子间C-H芳基化,然后是分子内脱羧环化,得到各种有价值的菲。该反应方案可以扩展到苯并菲的合成,其中降冰片烯是助催化剂。有趣的是,甲酯的脱羧是通过溶剂介导的 C Me -O 键断裂完成的。