Development of New Catalytic Activities of Rhenium Complexes and Their Applications

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Compared to other metal elements, only a few synthetic reaction have been reported. Therefore, we started to explore the possibility of the use of rhenium complexes in organic synthesis. During this project we have found the following reactions using specific features of rhenium complexes. (1) Novel reactions based on the C(sp^2)-H bond activation with rhenium complexes. (2) Novel reactions based on the C-C bond cleavage of β-keto esters with rhenium complexes. (3) Rhenium catalyzed stereoselective [3+2]cycloaddition between β-keto esters and allenes. (4) Regioselective alkylation of phenols using olefins with a rhenium catalyst. (5) Manganese-catalyzed selective [2+2+2]cycloaddition leading to p-terphenyls