Synlett, Inhaltsverzeichnis Synlett 2020; 31(18): 1789-1794DOI: 10.1055/s-0040-1707264 letter Epoxidation of Alkenes with Molecular Oxygen as the Oxidant in the Presence of Nano-Al2O3 Xuan Zhou , Qiong Wang , Wenfang Xiong , Lu Wang , Rongkai Ye , Ge Xiang , Chaorong Qi∗ , Jianqiang Hu∗ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 51064, P. R. of China › Institutsangaben Artikel empfehlen Abstract Artikel einzeln kaufen Alle Artikel dieser Rubrik Abstract The nano-Al2O3-promoted epoxidation of alkenes with molecular oxygen as the oxidant has been developed, providing an efficient route to a variety of epoxides in moderate to excellent yields. The environmentally friendly and efficient nano-Al2O3 catalyst could be easily recovered and reused five times without significant loss of activity. Key words Key wordsalkenes - nano-alumina - epoxidation - epoxides - molecular oxygen Volltext Referenzen References and Notes 1a Mulzer M, Coates GW. 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After removing the solvent under vacuum, the crude product was separated by column chromatography on silica gel using PE–EtOAc as eluent to give the product 2a as a pale-yellow oil; yield 84%. IR (KBr): 3060, 2933, 1450, 966, 859, 749, 543 cm–1. MS (EI): m/z = 174 [M+]. 1H NMR (500 MHz, CDCl3): δ = 7.27–7.11 (m, 5 H), 2.95 (d, J = 3.5 Hz, 1 H), 2.19–2.13 (m, 1 H), 2.02–1.97 (m, 1 H), 1.92–1.81 (m, 2 H), 1.53–1.41 (m, 2 H), 1.38–1.31 (m, 1 H), 1.24–1.15 (m, 1 H). 13C NMR (126 MHz, CDCl3): δ = 142.6, 128.3, 127.2, 125.3, 61.9, 60.2, 28.9, 24.8, 20.2, 19.8. 18 CCDC 2019579 contains the supplementary crystallographic data for compound 2r. The data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/getstructures. 19 Tsuchiya F, Ikawa T. Can. J. Chem. 1969; 47: 3191 Zusatzmaterial Zusatzmaterial Supporting Information
