Development of Reactions Catalyzed by Molybdenum Complexes with π-Ligands

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We developed a couple of novel and efficient molybdenum-catalyzed reactions based on nature of π-type ligand which acted as both activation and stabilization of real catalytic species by the presence of equilibrium between σ- and π-type ligands. Our major findings were the follows ; 1) catalytic and nucleophilic substitution of allyl ethers by bromide ions delivered by molybdenum, 2) effect of π-propargyl ligands with various substituents on molybdenum to their catalytic activity, 3) cyclization of diynes catalyzed by molybdenum π-ligand complexes.