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Issue 8, 2013
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SnTUD-1: a solid acid catalyst for three component coupling reactions at room temperature

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Abstract

A novel wormhole structured mesoporous material containing tin, SnTUD-1, was prepared by a direct hydrothermal synthesis method using triethanolamine (TEA) as an organic inexpensive mesoporous structure directing agent. XRD and N2 sorption studies of SnTUD-1 confirmed the amorphous mesoporous nature of SnTUD-1, which possessed a large surface area of 555 m2 g−1 and a pore diameter of 7.4 nm. HR-TEM further ascertained the disordered pores in their morphology and the presence of nano-domains of SnO2 species. The nature of the Sn4+ ion co-ordination with the silica matrix was evaluated by using different techniques including diffuse reflectance UV-Vis, FTIR, 29Si MAS NMR and XPS. SnTUD-1 had an interesting Lewis acidity as measured by FTIR of pyridine adsorption which provided excellent activities in one-pot three-component Mannich-type reactions of ketones with aldehydes and amines at room temperature.

Graphical abstract: SnTUD-1: a solid acid catalyst for three component coupling reactions at room temperature

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Publication details

The article was received on 26 Apr 2013, accepted on 18 Jun 2013 and first published on 18 Jun 2013


Article type: Paper
DOI: 10.1039/C3GC40792F
Citation: Green Chem., 2013,15, 2158-2166
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    SnTUD-1: a solid acid catalyst for three component coupling reactions at room temperature

    M. P. Pachamuthu, K. Shanthi, R. Luque and A. Ramanathan, Green Chem., 2013, 15, 2158
    DOI: 10.1039/C3GC40792F

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