Syntheses of Novel Transition Metal-Carbene Complexes Effective for C-H Bond Activation of Alkanes and Development of New Synthetic Reactions

合成了由N-杂芳卡宾连接的新型铑配合物，并在光照射条件下考察了它们对芳烃和烷烃碳氢键活化的催化活性。然而，铑配合物对反应的反应性较低。在羰基化合物存在的情况下进行羰基化反应时，观察到了加速效应。在合成活性更高的过渡金属络合物的研究过程中，实现了钯催化的末端炔烃与烯烃的脱氢偶联反应，以及由环丁醇催化的环戊醇的不对称合成环戊醇。

New rhodium complexes that are ligated by N-heteroaromatic carbenes were synthesized, and, under photo irradiation condition, their catalytic activities toward carbon-hydrogen bond activations of arenes and alkanes were investigated. However, the rhodium complexes were less reactive for the reactions. When the carbonylation reaction was carried out in the presence of carbonyl compounds, the acceleration effect was observed. During the course of the research directed toward the syntheses of more active transition metal complexes, palladium-catalyzed dehydrogenative coupling reaction of terminal alkynes with alkenes, and rhodium-catalyzed enantioselective synthesis of cyclopentanols from cyclobutanols were achieved.