The oxyarylation of dihydronaphthalene (1a), two electron‐rich (1b,c) and one electron‐poor (2) chromenes with different o‐iodophenols and their acetates 3a–h has been investigated by using either Pd(OAc)2 (10 mol‐%) as precatalyst and Ag2CO3 as base in acetone as solvent or oxime palladacycle 5 as precatalyst and dicyclohexylamine as base in DMA/H2O. The reactions, which were strongly accelerated under microwave heating, afforded the best yields when electron‐rich chromenes reacted with o‐iodophenols substituted by electron‐withdrawing groups in the presence Pd(OAc)2 and Ag2CO3. However, in the case of electron‐poor chromenes the best yield was obtained with the electron‐rich o‐iodophenol 3g.

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Microwave-Promoted Palladium-Catalyzed Oxyarylation of Dihydronaphthalene and Chromenes by o-Iodophenols and Its Acetates. -The best yields are obtained for reactions of electron-rich olefins (I) and (IV) with iodophenols substituted by electron-withdrawing groups. For the electron-poor quinone (VII), the best result is obtained with the electro-rich iodophenol (Vc). -(LEAO, R. A. C.; PINHO, V. D.; COELHO, A. S.; BUARQUE, C. D.; MORAES, P. F.; ALONSO, D. A.; NAJERA, C.; COSTA*, P. R. R.; Eur.