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Issue 10, 2013
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An extremely stable and highly active periodic mesoporous Lewis acid catalyst in water-medium Mukaiyama-aldol reaction

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Abstract

A periodic mesoporous Lewis acid catalyst ((OTf)2Sc-SO3-Ph-PMO) was synthesized through chelating scandium triflate (Sc(OTf)3) with sodium benzenesulfonate-functionalized periodic mesoporous silica (PhSO3Na-Ph-PMO). Compared with homogeneous catalyst Sc(OTf)3 and mesoporous SBA-15-supported scandium triflate catalyst ((OTf)2Sc-SO3-Ph-SBA-15), it exhibited superior catalytic activity and selectivity in water-medium Mukaiyama-aldol reaction. Hydrophobicity tests and substrate adsorption experiments demonstrated that its unique catalytic performance was related to the combined advantage of mesoporosity and hydrophobic microenvironment, which effectively stabilized and concentrated the substances as well as decreased intrinsic mass transfer resistance. Noted that the periodically arranged Lewis acids in the mesoporous silica framework inhibited the active sites leaching, leading to its high catalytic recyclability with almost unchanged catalytic efficiency for more than 10 times in water media.

Graphical abstract: An extremely stable and highly active periodic mesoporous Lewis acid catalyst in water-medium Mukaiyama-aldol reaction

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Publication details

The article was received on 30 May 2013, accepted on 16 Jul 2013 and first published on 16 Jul 2013


Article type: Paper
DOI: 10.1039/C3GC41020J
Green Chem., 2013,15, 2865-2871

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    An extremely stable and highly active periodic mesoporous Lewis acid catalyst in water-medium Mukaiyama-aldol reaction

    F. Zhang, C. Liang, M. Chen, H. Guo, H. Jiang and H. Li, Green Chem., 2013, 15, 2865
    DOI: 10.1039/C3GC41020J

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