Oxidation-promoted synthesis of ferrocenyl planar chiral rhodium(iii) complexes for C–H functionalization catalysis

Julien Cabanes (1) , Maksym Odnoroh (1) , Carine Duhayon (1) , Christian Bijani (1) , Alix Sournia-Saquet (1) , Rinaldo Poli (1, 2) , Agnès Labande (1)

1 LCC - Laboratoire de chimie de coordination
2 IUF - Institut universitaire de France

The chemical oxidation of rhodium(i) complexes [Rh(L)(COD)][BF4], where L is a ferrocenyl phosphine/N-heterocyclic carbene ligand, with 2 equiv. of a triaryl-aminium salt [(4-BrC6H4)3N][BF4] in acetonitrile gave planar chiral, air-stable [Rh(L–H)(MeCN)3][BF4]2 complexes where the ferrocene (C5H4CH2ImR or C5H4CH2BImCH2Mes) ring has been C–H activated at the position 2 in good to excellent yields. An important reactivity difference between our complexes and the ubiquitous [Cp*Rh(MeCN)3]X2 complex has been observed in the Grignard-type arylation of 4-nitrobenzaldehyde.

Mots clés: Rhodium; N-heterocyclic carbenes; Ferrocene; Redox active ligands; Catalysis

Domaines: Chimie de coordination

Julien Cabanes, Maksym Odnoroh, Carine Duhayon, Christian Bijani, Alix Sournia-Saquet, et al.. Oxidation-promoted synthesis of ferrocenyl planar chiral rhodium(iii) complexes for C–H functionalization catalysis. Mendeleev Communications, 2021, 31 (5), pp.620-623. ⟨10.1016/j.mencom.2021.09.010⟩. ⟨hal-03412564⟩