Synthesis of (NHC)Pd(salicylaldimine)Cl complexes through template-directed ortho-aromatic metaloxylation of NHC–palladacycles derived from arylimines

Abstract

Reactions of imidazoliums with palladacycles afforded NHC–palladacycle complexes. The reactivity of the NHC–palladacycles was explored and the results demonstrated that they could be template-directed ortho-aromatic metaloxylated in the presence of tert-butyl hydroperoxide (TBHP), affording (NHC)Pd(salicylaldimine)Cl complexes. Furthermore, the NHC–palladacycles showed efficient catalytic activities toward the ortho-aromatic hydroxylation of arylimines.