Ruthenium Carbene Siloxide Complexes Immobilized on Silica: Synthesis and Catalytic Activity in Olefin Metathesis

Abstract Ruthenium alkylidene complexes, based on second generation Hoveyda–Grubbs catalysts, have been directly attached to silica through covalent Ru‐O‐Si bonds, characterized by using cross polarization magic angle spinning 13 C NMR (CP MAS 13 C NMR) spectroscopy, and proved active in selected metathetic transformations. The complexes can be easily recycled and subsequently reused. In the ring closing metathesis (RCM) reaction of diethyl diallyl malonate the heterogenized complex can be recycled up to 15 times.