H3PW12O40/SBA-15 for the solventless synthesis of 3-substituted indoles

Tayebee, R, Lee, A, Frattini, L and Rostami, S 2019, 'H3PW12O40/SBA-15 for the solventless synthesis of 3-substituted indoles', Catalysts, vol. 9, no. 5, 409, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

Title H3PW12O40/SBA-15 for the solventless synthesis of 3-substituted indoles
Author(s) Tayebee, R
Lee, A
Frattini, L
Rostami, S
Year 2019
Journal name Catalysts
Volume number 9
Issue number 5
Article Number 409
Start page 1
End page 7
Total pages 7
Publisher MDPIAG
Abstract A family of silica-supported H3PW12O40 (HPW) solid acid catalysts was prepared by wet impregnation of mesoporous SBA-15 and investigated for the solventless synthesis of 3-substituted indoles under mild conditions. Mesoporous SBA-15 facilitated a high dispersion of immobilised H3PW12O40, significantly improving the catalytic efficiency of the heteropolyacid for the desired multi-component transformation. The yield of 3-substituted indoles strongly correlated with HPW loading (which spanned 3.2-51.6 wt %) and corresponding acid strength; the 51.6 wt % HPW/SBA-15 delivered 81% yield of 2-[(1H-indol-3-yl)(phenyl)methyl]malononitrile, approximately five times greater than that of the unsupported HPW, and exhibited a broad substrate scope for aromatic aldehydes.
Subject Catalysis and Mechanisms of Reactions
Keyword(s) H3PW12O40
SBA-15
3-substituted indole
Condensation
DOI - identifier 10.3390/catal9050409
Copyright notice © 2019 by the authors. Licensee MDPI, Basel, Switzerland. Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
ISSN 2073-4344
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