Selective epoxidation and allylic oxidation of olefins catalyzed by BEA-Ti and porphyrin catalysts

Tingting Ma, Chao Xu, Fengyang Liu, Yirong Feng, Wenyan Zhang, Weiwei Tang, Haoyu Zhang, Xiaowei Li, Yingying Nie, Shuangfei Zhao, Yuguang Li, Dong Ji, Zheng Fang, Wei He, Kai Guo

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摘要

Selective epoxidation and allylic oxidation of cyclohexene were realized in the presence of BEA-Ti and (metallo)porphyrin catalysts. The integration of BEA-Ti and porphyrin H2MTPP afforded cyclohexene oxide with excellent selectivity (cyclohexene oxide/ 2-cyclohexen-1-one=85:15). BEA-Ti and metalloporphyrin MnMTPP yielded 2-cyclohexen-1-one with high selectivity (cyclohexene oxide/ 2-cyclohexen-1-one=12:88). Resulting active species involving of (metallo)porphyrin, TiIV sites and tert-butyl hydroperoxide (TBHP) promoted the oxidation process of cyclohexene. A possible mechanism resulting in the formation cyclohexene oxide and 2-cyclohexen-1-one was proposed. The outer-sphere effect constructed by (metallo)porphyrin, TiIV sites and TBHP on the surface of BEA-Ti framework improved the epoxidation and allylic oxidation both in the conversion and selectivity.

源语言英语
文章编号113074
期刊Molecular Catalysis
541
DOI
出版状态已出版 - 15 4月 2023

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