Titanium(IV)–Salan Catalysts for Asymmetric Sulfoxidation with Hydrogen Peroxide

✍ Scribed by Pedro Adão; Fernando Avecilla; Marcella Bonchio; Mauro Carraro; João Costa Pessoa; Isabel Correia

• Book ID: 102827128
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 862 KB
• Volume: 2010
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.201000792

✦ Synopsis

We report the synthesis and the solution and solid-phase characterization of several titanium(IV)-salan complexes. The structures of the ligands H 2 sal(R,R-chan), H 2 ovan(S,Schan), and H 6 pyr(R,R-chan) 4+ •4Cl -•H 2 O were determined by single-crystal X-ray diffraction and their main features are compared and discussed. Single crystals suitable for X-ray diffraction studies were also obtained for [Ti 4 {sal(R,Rchan)} 4 (μ-O) 4 ] and showed a tetranuclear core bearing μ-oxo bridges between the titanium atoms and the ligand wrapped around the Ti in a fac-mer geometry. The Ti-salan complexes were tested as catalysts in the benchmark oxidation of [a]