Autoxidation of Cycloalkenes by the System "Molecular Oxygen-bis(acetylacetonato) Cobalt (II) Complex-butyraldehyde"

作者：Fang Zhao; Tang Rui ren^*; Zhang Rui rong; Huang Ke long

来源：Bulletin of the Korean Chemical Society, 2009, 30(10): 2208-2212.

DOI：10.5012/bkcs.2009.30.10.2208

• Epoxidation
• Cycloalkenes
• Acetylacetone cobalt (II)
• Molecular oxygen

Oxidation of cycloalkenes with O(2) promoted by heterogeneous bis(acetylacelonato) cobalt (II) complex catalyst which can be recycled has been performed under mild conditions. It was found that beta-ionic, cyclohexene, 1-methylcyclohexene, and alpha-ionone were efficiently oxidized with O(2) in the presence of Co (II) complex and butyraldehyde at 55 degrees C. A simple treatment of the resulting products led to epoxides as predominant products and a small amounts of allylic oxides. the chemoselectivity for the former being 82.1-90.8% with a 70.6-98.6% substrate conversion. On the other hand, oxidation or 1-phenylcyclohexene, 1-cyclohex-1-enylethan-1-one, alpha-pinene. and beta-pinene gave allylic oxides as major products.

• 出版日期2009-10-20
• 单位中南大学