环己酮
双金属片
催化作用
醛
苯甲醛
溶剂
化学
Baeyer–Villiger氧化
产量(工程)
材料科学
有机化学
化学工程
复合材料
工程类
作者
Mengyang Li,Bin Gu,Jingmei Li,Huangzhao Wei,Weiyang Xue,Yukun Jiang,Chao Sun
标识
DOI:10.1002/cctc.202300852
摘要
Abstract Upgrading cyclohexanone to ϵ‐caprolactone (ϵ‐CL) is of great importance to the synthesis of high value‐added downstream chemicals and the reduction of foam plastic. The catalytic synthesis of ϵ‐CL from cyclohexanone through O 2 /aldehyde method is an environmentally benign one‐pot tandem reaction without using peroxy acid, balancing the requirements of safety and efficiency. However, due to lack of elaborate design and collaboration of multiple active sites for catalysts, the catalytic efficiency of O 2 /aldehyde method still remains to be improved. Herein, a pitaya‐like catalyst (CeFe@RDC‐3) with Ce and Fe highly dispersed on resin‐derived‐carbon is synthesized through high temperature self‐assembly. On this bimetallic catalyst, high yield (97 %) of ϵ‐CL is achieved through aerobic oxidation of cyclohexanone with only 1.5 equivalent benzaldehyde. Moreover, considerable yields of ϵ‐CL, 88.3 % and 74.7 %, respectively, are also obtained over CeFe@RDC‐3 with green solvent (EtOAc) or even without solvent. No loss of activity is observed after five successive cycles, demonstrating high stability of CeFe@RDC‐3. The mechanism study reveals that the high performance of CeFe@RDC‐3 is ascribed to the Ce−Fe bimetallic synergy, uniform metal dispersion, abundant active oxygen and stabilizing effect of resin‐derived‐carbon to free radicals. This work provides prospect for a green, safe and low‐cost strategy for Baeyer‐Villiger process.
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