Catalysis by Carbon Materials for the Aerobic Baeyer鈥揤illiger Oxidation in the Presence of Aldehydes
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- 作者：Yuta Nabae ; Hodaka Rokubuichi ; Masatomo Mikuni ; Yongbo Kuang ; Teruaki Hayakawa ; Masa-aki Kakimoto
- 刊名：ACS Catalysis
- 出版年：2013
- 出版时间：February 1, 2013
- 年：2013
- 卷：3
- 期：2
- 页码：230-236
- 全文大小：320K
- 年卷期：v.3,no.2(February 1, 2013)
- ISSN：2155-5435
文摘
Aerobic Baeyer鈥揤illiger oxidation of ketones to corresponding esters was performed using metal-free carbon as a solid catalyst and benzaldehyde as the sacrificing agent. Several carbon materials were tested for the oxidation of cyclohexanone to 蔚-caprolactone, and it was found that Ketjen Black showed the highest catalytic activity, over 90% of 蔚-caprolactone yield at 50 掳C. A catalyst recycling test suggests that the catalyst has high durability under the reaction condition of oxygen atmosphere at 50 掳C. Mechanistic study suggests that peracid species produced by a series of chain propagation reactions is the key intermediate, and the carbon catalyst contributes to high aldehyde efficiency by buffering the radical species, which are essential for the chain propagation reactions.