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Anguo Ying,Zhifeng Li,Yuxiang Ni,Songlin Xu,Hailiang Hou,Huanan Hu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
Four novel multiple-acidic ionic liquids based on triethanolamine (TEA) were prepared and used as efficient catalysts to synthesize bis-indolylmethanes at room temperature without any organic solvent. [TEOA][HSO4] showed the best catalytic performance. The optimal amount of catalyst was 10 mol%. Various aldehydes/ketones reacted with indole/substituted indole smoothly and afforded to corresponding products in 70–99% yields within minutes. Additionally, the ionic liquid could be reused up to five times with only a slight decrease in catalytic activity. Finally, a possible reaction mechanism was given. Techniques of acidity test and NMR were introduced to verify the proposed mechanism.
Zhongqiu Liu,Yuanyuan Yu,Shengnan Li,Yaqi Liu,Guoqiang Zhang,Long Han,Yujing Liu,Jinmao You,Anguo Ying 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
The preparation of materials with a well-defined mesoporous structure and hydrophobicity is of greatsignificance for heterogeneous catalyst development, yet there still remains a challenge for fabricatingthe above materials without using templates. Herein, the polymerization of L-proline-functionalizedmonomer with crosslinkers containing variable alkyl-bridged length (n = 2,4,6,8) and vinyl-modifiedFe3O4 nanoparticles to construct mesoporous poly(L-proline)s (MPLPs) has been reported for the firsttime. The resultant MPLPs were analyzed by characterization methods, suggesting that MPLPs with awell-defined mesoporous structure and unique hydrophobicity were successfully constructed by synergisticregulation of vinyl-modified Fe3O4 nanoparticles and crosslinkers with alkyl-bridged length of 6carbon atoms, in which vinyl-modified Fe3O4 nanoparticles as structural reinforcer plays a vital rolefor the mesoporous formation. Moreover, the resultant MPLPs were found to be efficient catalysts forone-pot synthesis of functionalized spiroindolones and olefins. The kinetic study and the water contactangle indicate the mesoporous confinement and hydrophobic micro-environment in organic transformations. Hence, the high activity of MPLPs is ascribed to synergistic effect of mesoporous confinement andhydrophobic micro-environment, and the adsorption experiment results further confirm this synergisticcatalysis. This work promotes a textural engineering approach to the development of multifunctionalmaterials with well-defined mesopores and hydrophobicity.