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Design of zeolite catalysts for nitroaldol reaction under mild condition

Paper ID Volume ID Publish Year Pages File Format Full-Text
40879 45869 2012 6 PDF Available
Title
Design of zeolite catalysts for nitroaldol reaction under mild condition
Abstract

NaY and KL zeolites were modified by impregnating with potassium fluoride for investigating their basicity and catalytic activity towards Henry nitroaldol reaction under different reaction conditions. Effects of solvents, temperature, catalysts and ratio of substrate versus reagents were studied to optimize the reaction conditions. The catalysts were characterized by FTIR, XRD and SEM techniques and the products were characterized by 1H NMR, 13C NMR and FTIR techniques. It was observed that NaY/KF zeolite with H2O–MeOH pair as solvent showed good conversion and selectivity at room temperature. Both XRD and FTIR study showed no change of spectral patterns for both modified and parent zeolites. We have again showed a plot of Hammett free energy linear relationship in terms of percentage yield and Hammett substituent constant.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (124 K)Download as PowerPoint slideHighlights► Henry nitroaldol reaction conditions were optimized with moderately weak base catalysts under various reaction conditions. ► Basic zeolites NaY, KL and their alkali metal impregnated form are found to be effective catalysts for nitroaldol reaction. ► Framework structure of zeolites does not break after modification. ► The reaction gives nitroaldol product in good yield.

Keywords
Zeolite; Base catalyst; Henry nitroaldol reaction; β-Nitro alcohols; Hammett's constant
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Design of zeolite catalysts for nitroaldol reaction under mild condition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 433–434, 8 August 2012, Pages 122–127
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