Intramolecular cycloisomerization of aryl-substituted alkylidenecyclopropanes via NHC palladium-catalyzed cascade C-C bond cleavage/C-H activation/C-C bond formation.

[摘要]：A well-defined N-heterocyclic carbene (NHC) palladium-catalyzed intramol. cyclization reaction of aryl-substituted alkylidenecyclopropanes (ACP) to 1-aryl-3,4-dihydronaphthalenes is described. The NHC salts were found to suppress b-hydride elimination from the homoallylpalladium intermediate, which may lead to unwanted alkene formation. A plausible mechanism for the cycloisomerization was proposed.

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