Preparation of Highly Active Catalysts Utilizing Synergetic Effects between Solid Surfaces and Metal Complexes

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The development of novel catalysts for environmentally benign, energy-efficient organic synthetic processes is of great importance. In the present study, solid metal oxide-supported catalysts having excellent activities for the selective monoamination of 1,4-, 1,5-, and 1,6-diols by primary amines to give linear N-(hydroxyalkyl)amines have been developed. On the other hand, silicas as additives strongly promoted the epoxidation of cyclooctene by tBuOOH in the presence of Ti-silsesquioxane (Ti-POSS), where Ti species were found to be bound to the silica surface through the ligand exchange. Furthermore, highly -active silica-supported Ti catalysts were prepared by the thermal treatment of mixtures of Ti-POSS and silica.