Research on Chemical Intermediates p. 6889 - 6910 (2017)
Update date:2022-08-05
Topics:
Kazemnejadi, Milad
Shakeri, Alireza
Nikookar, Mahsa
Mohammadi, Mohammad
Esmaeilpour, Mohsen
Abstract: A new Co(II)-Schiff base complex was decorated on a polysalicylaldehyde (PSA) framework and used as a selective and efficient catalyst for the epoxidation of alkenes in the presence of O2 as a green source of oxygen without aco-reductant. The catalyst was characterized step by step by FTIR, UV–Vis, 1H NMR, TGA, CHN, XPS and EDX analyses. Loading an amount of Co ions in the catalyst as well as its leaching amount were studied by an ICP-OES instrument. The catalyst demonstrated excellent activity for the of a variety of alkenes in a mild, inexpensive and efficient protocol. Also, the catalyst can be simply recovered from the reaction mixture and reused for several times without any noteiceable loss in its activity. Reaction parameters including temperature, oxygen flow volume, catalyst amount and solvent were screened by reaction time. Catalytic studies including XPS spectroscopy and some blank experiments were performed to obtain an initial insight into the reaction mechanism. Also, the reactivity of the novel catalyst was evaluated as the turnover frequency. Graphical Abstract: A new and efficient protocol have been developed for the selective epoxidation of olefins using a heterogeneous recyclable Co(II)-Schiff base complex of polysalicylaldehyde in mild and self-coreductant conditions by molecular oxygen.
View MoreZIBO ZEYUAN IMPORT & EXPORT CO.,LTD
Contact:+86-533-6723789
Address:Zhangdian District Youth League West Blue Diamond International 408 121
Contact:0550-7041128 0550-7090578
Address:Wangdian Street,Xinjie Town
ShangHai Ruiyi Medical Technology Co.,Ltd.
Contact:+86-21-54718086
Address:No951 Jianchuan RD,Minhang District
Hefei EnliPharma Tecnology Co.,Ltd
Contact:0086-551-66399836
Address:Qing Cheng ShuiXiang Building 805, Mengcheng North Road , ShuangFeng Economic Development Zone Anhui HeFei
ZHANGJIAGANG FREE TRADE ZONE YONG HAN INTERNATIONAL TRADING CO., LTD
Contact:86 512 57910558
Address:qianjin M road
Doi:10.1002/ejoc.201200150
(2012)Doi:10.1002/adsc.202100047
(2021)Doi:10.1016/j.tetlet.2017.09.068
(2017)Doi:10.1021/acs.orglett.0c01783
(2020)Doi:10.1039/c7cc00781g
(2017)Doi:10.1016/j.bmc.2012.03.060
(2012)