A series of epoxybenzo[k]fluoranthenes, epoxy-5H-benzo[b]fluorenes, and their aza analogues have been accessed via palladium-catalyzed exo-selective [3 + 2] annulation between aryl halides and 7-oxa- and 7-azabenzonorbornadienes. The reaction is initiated by the oxidative addition of a carbon–halogen bond, with intramolecular C(sp² or sp³)–H activation being a key step. The enantioselective version of the reaction was also briefly explored.

中文翻译：

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钯催化的 [3 + 2] 芳基卤化物与 7-Oxa- 和 7-氮杂苯并降冰片二烯通过 C（sp2 或 sp3）–H 活化环化

通过钯催化的芳基卤化物和 7-oxa- 和 7 之间的外选择性 [3 + 2] 环化，获得了一系列环氧苯并 [ k ] 荧蒽、环氧 -5 H -苯并 [ b ] 芴及其氮杂类似物-氮杂苯并降冰片二烯。该反应由碳-卤键的氧化加成引发，分子内 C(sp ²或 sp ³ )-H 活化是关键步骤。还简要探讨了该反应的对映选择性版本。