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Aerobic epoxidation of cyclic alkenes catalyzed by poly(vinylbenzyl)acetylacetonato cobalt(II complex

✍ Scribed by Tie-Jun Wang; Yuan-Yong Yan; Mei-Yu Huang; Ying-Yan Jiang

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 452 KB
Volume: 29
Category: Article
ISSN: 1381-5148
DOI: 10.1016/1381-5148(96)00009-0

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✦ Synopsis

Poly(vinylbenzyl)acetylacetonato complex of cobalt is an effective and stable catalyst for the epoxidation of cycloalkenes with molecular oxygen under 25°C with i-butyraldehyde as the sacrificial reductant. The acetylacetone ligand/Co mole ratio, the reaction time, and the strain and electronic nature of cycloalkenes all affect the conversions of alkenes and selectivities to the corresponding epoxides. The catalyst can be recycled at least seven times without loss of its activity.

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