Manganese porphyrin-mediated aerobic epoxidation of propylene with isoprene: A new strategy for simultaneously preparing propylene epoxide and isoprene monoxide  

作　　者：Xian-Tai Zhou Hai-Yang Yu Yang Li Hai-Bo Wu Hong-Bing Ji 

机构地区：[1]Fine Chemical Industry Research Institute,School of Chemical Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China [2]Fine Chemical Industry Research Institute,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China [3]Huizhou Research Institute,Sun Yat-sen University,Huizhou 516081,China [4]Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,China

出　　处：《Chinese Chemical Letters》2023年第3期236-239,共4页中国化学快报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2020YFA0210900);the National Natural Science Foundation of China(Nos.21938001 and 21878344);Guangdong Provincial Key R&D Programme(No.2019B110206002);the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(No.2017BT01C102)。

摘　　要：The direct epoxidation of propylene by O_(2) is a significant and challenging topic. The key factor for this homogeneous aerobic epoxidation is the activation of molecular oxygen under mild conditions. In this work,the aerobic epoxidation of propylene catalyzed by manganese porphyrins was achieved in the presence of isoprene. Isoprene contains an allyl methyl group, and the α-H can be easily removed to achieve the activation of molecular oxygen. The conversion of propylene was 38% and the selectivity toward propylene oxide(PO) was up to 87%. The role of isoprene was demonstrated, and a plausible mechanism was proposed. The protocol reported herein is expected to provide a strategy for the simultaneous preparation of propylene oxide and isoprene monoxide.

关 键 词：PROPYLENE EPOXIDATION DIOXYGEN ISOPRENE METALLOPORPHYRINS 

分 类 号：TQ223.26[化学工程—有机化工] TQ221.22