New salan and salen vanadium complexes: Syntheses and application in sulfoxidation catalysis

New salan- and salen-vanadium complexes display high activity and selectivity in sulfoxidation of thioanisole. Salan-type complexes perform better. Well-defined binaphthyl-based salen complexes display better catalytic performance than in-situ prepared systems using [VO(acac)2] and the ligand precursor.138