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Metal–salen complexes as efficient catalysts for the oxygenation of heteroatom containing organic compounds—synthetic and mechanistic aspects

✍ Scribed by Natarajan S. Venkataramanan; Gopi Kuppuraj; Seenivasan Rajagopal

Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 394 KB
Volume: 249
Category: Article
ISSN: 0010-8545
DOI: 10.1016/j.ccr.2005.01.023

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✦ Synopsis

The metal-salen complexes (metal = Mn, Cr, Fe, Ru, Co, V and Ti) find widespread use as efficient catalysts for the selective oxygenation of organic sulfides, sulfoxides and aromatic amines. The active oxidant can be generated from the metal-salen ion using PhIO, H 2 O 2 , t-BuO 2 H and ClO -as the oxygen source. The catalytic activity of these complexes can be finely tuned by introducing substituents in the 3and 5-positions of the salen ligand. As far as Cr(V) oxidation of amine is concerned, the addition of donor ligand is indispensable to get

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