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12-Tungstophosphoric acid supported on zirconia as an efficient and heterogeneous catalyst for the synthesis of bis(indolyl)methanes and tris(indolyl)methanes

Paper ID Volume ID Publish Year Pages File Format Full-Text
52103 46865 2008 8 PDF Available
Title
12-Tungstophosphoric acid supported on zirconia as an efficient and heterogeneous catalyst for the synthesis of bis(indolyl)methanes and tris(indolyl)methanes
Abstract

12-Tungstophosphoric acid (TPA) supported on zirconia was employed as an efficient, heterogeneous catalyst for the liquid phase electrophilic substitution reactions of indoles with aldehydes or indole aldehyde to afford the corresponding bis(indolyl)methanes or tris(indolyl)methanes in good to high yields. The catalytic efficiency of TPA was found to increase after supporting on zirconia, which was expressed in terms of TON (turnover number) and TOF (turnover frequency, h−1). The catalyst was characterized by XRD, FTIR, BET surface area, elemental analysis and SEM technique and was found to be reusable without significant loss of activity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
12-Tungtophosphoric acid; Bis(indolyl)methane; Tris(indolyl)methane; TON
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12-Tungstophosphoric acid supported on zirconia as an efficient and heterogeneous catalyst for the synthesis of bis(indolyl)methanes and tris(indolyl)methanes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 6, 31 March 2008, Pages 1071–1078
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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