Controllable Factors of Supported Ir Complex Catalysis for Aromatic C–H Borylation
Kyogo Maeda, Yohei Uemura, Wang‐Jae Chun, Shazia Sharmin Satter, Kiyotaka Nakajima, Yuichi Manaka, Ken Motokura
Abstract
We have developed a catalyst in which an Ir complex and organic functionalities are coimmobilized on the silica surface. The catalytic activity for aromatic C–H borylation was significantly affected by (i) the linker length of the Ir–bipyridine complex, (ii) the coimmobilized organic functionality, and (iii) the substituents on the aromatic substrate compounds. The fine-tuned supported catalyst showed higher activity than the homogeneous Ir–bipyridine complex when using a specific substrate such as benzonitrile. We elucidated this property by conducting solid-state NMR, FT-IR, XAFS, and in situ FT-IR analysis.
Topics & Concepts
BorylationCatalysisBenzonitrileChemistrySubstrate (aquarium)Heterogeneous catalysisBipyridineHomogeneous catalysisLinkerIridiumX-ray absorption fine structureCombinatorial chemistryOrganic chemistrySpectroscopyGeologyCrystal structureQuantum mechanicsOceanographyAlkylComputer scienceOperating systemPhysicsArylCatalytic Cross-Coupling ReactionsCatalytic C–H Functionalization MethodsOrganoboron and organosilicon chemistry