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1. Metal-Sulfur Clusters
Metal-sulfur clusters constitute an extremely large family of metal compounds, which not only exhibit fascinating structures but also bear close relevance to some important enzymes or proteins in nature. For example, the ubiquitous iron-sulfur proteins contain iron-sulfur cluster cores, whose importance is comparable to that of widely known biological prosthetic groups such as hemes. We are interested to develop ruthenium-analogues of iron-sulfur clusters as structural/functional models of the active sites in related proteins or enzymes such as nitrogenase, to explore the potential utility of synthetic metal-sulfur clusters in catalysis, and to uncover previously unknown reactions of biologically related metal-sulfur clusters. Our recent work revealed that iron-sulfur clusters are active catalysts for group transfer reactions.
2. Terminal Sulfido and Phosphinidene Complexes of Transition Metals
Metal-ligand multiply bonded species play a vital role in some metal-mediated organic transformations. There have been numerous studies on metal complexes bearing terminal oxo, imido, and carbene groups. Such metal complexes are believed to be the active species in many oxygen, nitrogen, and carbon atom transfer reactions promoted by transition metals. Our attention is directed to the synthesis of reactive terminal sulfido and phosphinidene complexes of transition metals, particularly those supported by multidentate or macrocyclic ligands, and to their sulfur/ phosphorus atom transfer reactions with organic substrates. Recently, we have synthesized primary phosphine complexes of metalloporphyrins and metallophthalocyanines, such species could be useful precursors for the synthesis of the corresponding phosphinidene complexes.
3. Functionalization of X-H Bonds Mediated by Transition Metals
Metal-mediated functionalization of X-H bonds (X = C, N, P, etc.) provides unique access to important organic compounds. Our interest is the functionalization of N-H, P-H, and S-H bonds mediated by metalloporphyrins and metallophthalocyanines. We have recently found that some primary or secondary phosphines coordinated with metalloporphyrins or metallophthalocyanines are reactive with alkenes or haloalkanes to give hydrophosphination or P-alkylation products.
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Angewandte Chemieno. 9 (2023)
European Journal of Inorganic Chemistryno. 33 (2022)
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European Journal of Inorganic Chemistryno. 33 (2022)
Angewandte Chemieno. 34 (2021): 18891-18891
Angewandte Chemieno. 34 (2021): 18619-18629
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