Aerobic oxidation of sulfides catalysed by cobalt(II) complexes under homogeneous and heterogeneous conditions

✍ Scribed by Maria M. Dell'Anna; Piero Mastrorilli; Cosimo F. Nobile

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 604 KB
• Volume: 108
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(95)00302-9

✦ Synopsis

The Co(H)-catalysed oxidation of alkyl-and aryI-sulfides was achieved under homogeneous and heterogeneous conditions using oxygen or air as the oxidant in the presence of excess aldehyde. The reactions in the homogeneous phase were carried out using the soiuble Co(acac), or WAAEMA), complexes IAAEMA-= deprotonated form of 2-(acetoacetoxy)ethyl methacrylate) wherea!: the heterogeneous catalytic tests were carried out using the copolymers obtained by reaction of Co(AAEMA), with acrylamides. Under suitable conditions excellent conversions and very good selectivities were achieved both in homogeneous and in heterogeneous phase. The supported complexes were recyclable with negli,oible loss of efficiency and did not suffer from metal leaching.