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Friedel–Crafts propionylation of veratrole to 3,4-dimethoxypropiophenone over superacidic UDCaT-5 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
41277 45883 2012 8 PDF Available
Title
Friedel–Crafts propionylation of veratrole to 3,4-dimethoxypropiophenone over superacidic UDCaT-5 catalyst
Abstract

3,4-Dimethoxypropiophenone (3,4-DMPP) is of considerable commercial importance due to its use in fine chemical and drug industries. 3,4-DMPP is traditionally produced by the Friedel–Crafts propionylation of veratrole using homogeneous catalysts which are highly polluting. Zeolites have also been used but they are known to deactivate rapidly. A variety of novel solid acid catalysts such as UDCaT-4 (persulfated alumina zirconia on hexagonal mesoporous silica, HMS), UDCaT-5 (superacidic modified sulfated zirconia) and UDCaT-6 (modified sulfated zirconia nanoparticles on HMS) were synthesized in our laboratory and characterized. Amongst them UDCaT-5 was the most active and selective. The current work deals with development of clean and benign route for 3,4-DMPP synthesis using UDCaT-5 as catalyst in the absence of any solvent. Effects of various parameters were studied in order to optimize the conversion of veratrole and selectivity to 3,4-DMPP. Based on the experimental data a suitable mathematical model was developed to represent the reaction kinetics.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (90 K)Download as PowerPoint slideHighlights► Green propionylation of veratrole to 3,4-dimethoxypropiophenone. ► Different sulfate modified zirconia based catalysts. ► UDCaT-5 as the most active mesoporous solid acid catalyst ► 100% selective and reusable catalyst. ► Eley–Rideal mechanism.

Keywords
Solid superacids; Veratrole; Friedel–Crafts acylation; Kinetics; Selectivity
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Friedel–Crafts propionylation of veratrole to 3,4-dimethoxypropiophenone over superacidic UDCaT-5 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 411–412, 16 January 2012, Pages 123–130
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us