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Reported herein is a software of naphthalene as a masked conjugated diene in a palladium-catalyzed dearomative 1,4-diarylation or 1,4-vinylarylation effect via combination Heck/Suzuki series. Three types of 1,4-dihydronaphthalene-based spirocyclic compounds are achieved in exceptional regio- and diastereoselectivities. Key to this change could be the inhibition of a few competitive part reactions, including intramolecular naphthalenyl C-H aryla