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Catalytic synthesis of chalcone and flavanone using Zn–Al hydrotalcite adhere ionic liquid

Paper ID Volume ID Publish Year Pages File Format Full-Text
51282 46837 2009 8 PDF Available
Title
Catalytic synthesis of chalcone and flavanone using Zn–Al hydrotalcite adhere ionic liquid
Abstract

The Claisen–Schmidt condensation of 2′-hydroxy acetophenone and benzaldehyde to chalcone and flavanone show that calcined Zn–Al (6) hydrotalcite is active for this synthesis. Coating of ionic liquid ‘1-(tri-ethoxy-silyl-propyl)-3-methyl-imidazolium chloride’ on Zn–Al hydrotalcites was accomplished employing incipient wetness process and on NaY, NaX, MK-5 and silica gel employing co-condensation methodology. Impregnated IL on calcined Zn–Al (6) catalysts were characterized by XRD, SEM, BET, 13C and 27Al NMR analysis and the activity of these catalysts were investigated for chalcone and flavanone synthesis. 27Al CP MAS NMR technique was used to show that interaction of IL with hydrotalcite modifies the acid–base sites and is responsible for enhancement of catalyst activity. Several aromatic aldehydes were screened to assess the general applicability of the system.

Keywords
Claisen–Schmidt condensation; Chalcone; Flavanone; Zn–Al hydrotalcite; Ionic liquid; 27Al CP MAS NMR
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Catalytic synthesis of chalcone and flavanone using Zn–Al hydrotalcite adhere ionic liquid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 14, 25 August 2009, Pages 1881–1888
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us