N-Heterocyclic Carbene Piano-Stool Iron Complexes as Efficient Catalysts for Hydrosilylation of Carbonyl Derivatives

摘要

Hydrosilylation with well defined pianostooliron(II) complexes bearing both N-heterocycliccarbene and cyclopentadienyl ligands was accomplished with both aldehydes and ketones. Typically, the reduction of aldehydes exhibited good activities (full reduction at 30℃ in 3 h), whereas for ketones, the reaction need 16 h at 70℃ to obtain good conversions. Of notable interest is the use of visible light irradiation to generate one of the active catalyst.