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Trifluoromethanesulfonic acid supported on carbon used as catalysts in the synthesis of flavones and chromones

Paper ID Volume ID Publish Year Pages File Format Full-Text
52954 46892 2009 6 PDF Available
Title
Trifluoromethanesulfonic acid supported on carbon used as catalysts in the synthesis of flavones and chromones
Abstract

Solid acid catalysts based on trifluoromethanesulfonic acid (TFMS) were synthesized using two different activated carbons as supports. They were characterized by FT-IR, DTA–TGA and BET, and their acidity was measured by potentiometric titration with n-butylamine. The new catalysts were checked for the cyclization of 1-(2-hydroxyphenyl)-3-phenyl-1,3-propanedione. The reaction experiments were performed using toluene as the solvent, at reflux. In all cases the product (flavone) was obtained with high selectivity. Conversions up to 84% were obtained using the supported catalyst TFMSC2. The activity of the catalysts is strongly dependent on the textural properties of the support used to obtain them, particularly their mean pore size. Optimal reaction conditions were applied to the preparation of seven substituted flavones and chromones.

Keywords
Supported trifluoromethanesulfonic acid; Supported triflic acid; Flavones; Chromones; Carbon
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Trifluoromethanesulfonic acid supported on carbon used as catalysts in the synthesis of flavones and chromones
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 5, 25 January 2009, Pages 576–581
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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