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Novel nanohybrid materials based on l-leucine on hydrotalcite clays: Asymmetric epoxidation reaction of chalcona

Paper ID Volume ID Publish Year Pages File Format Full-Text
55683 47062 2011 5 PDF Available
Title
Novel nanohybrid materials based on l-leucine on hydrotalcite clays: Asymmetric epoxidation reaction of chalcona
Abstract

The assembly of biorgano-guest to laminar inorganic solids is of increasing interest to their versatile applications in biotechnology or catalysis. We synthesized two different biohybrid materials based on l-leu into the hydrotalcite rehydrated under ultrasound treatment (HTrus), in which l-leu was immobilized by intercalation or by replacing of hydroxyl ions at the edge sites of HTrus. Separately l-leu and HTrus as catalysts showed very poor activity and lack of enantioselectivity in the epoxidation reaction of α,β-unsaturated ketones such as chalcone. Nevertheless, the catalysts presented high activity and even enantioselectivity towards the trans-(R,S)-epoxide depending on the l-leu location on the nanohybrid catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (95 K)Download as PowerPoint slideHighlights► Two new methodologies for the synthesis of l-leu/HTrus biohybrid materials. ► l-leu immobilized by intercalation or replacing −OH at the edge sites of HTrus. ► Observed synergistic effect between l-leu and HT of nanohybrids. ► High activity and even ee towards the trans-(R,S)-epoxide in J.-C. epoxidation. ► The catalytic properties depend on the l-leu location on the nanohybrid catalyst.

Keywords
Hydrotalcites; Nanohybrids materials; Julià–Colonna reaction; Asymmetric catalysis; Chalcona; Epoxidation
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Novel nanohybrid materials based on l-leucine on hydrotalcite clays: Asymmetric epoxidation reaction of chalcona
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 172, Issue 1, 25 August 2011, Pages 48–52
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