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

Bulletin of the Korean chemical society

Rui ren Tang¹  Zhao Fang¹  Ke long Huang¹  Rui rong Zhang¹ 

关键词: Epoxidation;    Cycloalkenes;    Acetylacetone cobalt (II);    Molecular oxygen;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Oxidation of cycloalkenes with O₂ promoted by heterogeneous bis(acetylacetonato) cobalt (II) complex catalyst which can be recycled has been performed under mild conditions. It was found that �?-ionone, cyclohexene, 1-methylcyclohexene, and �?-ionone were efficiently oxidized with O₂ in the presence of Co (II) complex and butyraldehyde at 55 oC. 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 of 1-phenylcyclohexene, 1-cyclohex-1-enylethan-1-one, �?-pinene, and �?-pinene gave allylic oxides as major products.

【 授权许可】

Unknown