Citation:
HUANG Hongmei, XIAO Yi, YANG Xiya, BIAN Wenhuan, YIN Dulin, MAO Liqiu. Ionic Liquid-mediated Catalytic Oxidation of Isoeugenol to Vanillin via Oxovanadium 1,3,5-Benzenetricarboxylate[J]. Chinese Journal of Applied Chemistry,
;2014, 31(8): 952-957.
doi:
10.3724/SP.J.1095.2014.30510
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A series of oxovanadium 1,3,5-benzenetricarboxylate complex catalysts was prepared and characterized by FT-IR,diffuse reflectance UV-Vis(DR UV-Vis) and TG,respectively. The effects of catalyst,promoter such as ionic liquid,ionic liquid amount and reaction time on the oxidation of isoeugenol to vanillin were investigated systematically. VO(BTC)-1 with a molar ratio of VO2+ and BTC(1,3,5-benzenetricarboxylate) as 1:1 exhibits better catalytic performance. Complete conversion of isoeugenol and 87.c% yield of vanillin are achieved using VO(BTC)-1 as catalyst,1-dodecyl-3-methylimidazolium chloride([C12mim]Cl) as additive with the molar ratio of isoeugenol,H2O2 and [C12mim]Cl as 1:2:0.01 after 24 h reaction at 20℃ in acetone. The formation of a highly effective oxidation system from [C12mim]Cl/VO(BTC)-1 and H2O2 is beneficial in the mild conversion of isoeugenol,as indicated by spectral characterization and the reaction results.
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