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Modified Montmorillonite clay catalyzed regioselective ring opening of epoxide with amines and alcohols under solvent free conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
39478 45824 2014 7 PDF Available
Title
Modified Montmorillonite clay catalyzed regioselective ring opening of epoxide with amines and alcohols under solvent free conditions
Abstract

•Octahedral alumina leaches out due to acid treatment on Montmorillonite.•Acid treatment destroys layer structure to generate micro and mesopores.•Modified clay exhibits efficient activity for epoxide ring opening by amines and alcohols.•Better selectivity shown at ambient temperature without solvent.•Catalyst is reusable without significant loss in activity and selectivity.

Modification of Montmorillonite by acid treatment depletes the layered structure and generates micro- and mesopores. The catalytic activity of naturally occurring Montmorillonite clay modified by acid treatment is reported for the reactions of epoxides with nucleophiles such as amines and alcohols at ambient temperature and solvent-free condition. The solid acid catalyst of the present study is reusable and exhibits significantly higher catalytic activities than known catalysts for the opening of the oxirane ring with nitrogen (aromatic as well as aliphatic amines) and oxygen (aromatic as well as aliphatic alcohols). A wide range of β-amino alcohols and β-alkoxy alcohols are synthesized with high epoxide conversion of excellent regioselectivity. The modified catalyst is recycled up to five times without significant loss in conversion and selectivity.

Graphical abstractAcid treatment on naturally occurring Montmorillonite clay generates micro- and mesopores due to leaching of the Aluminium ions from the octahedral positions. This modified Montmorillonite clay is an efficient catalyst for ring opening of epoxide with amines and alcohols at ambient conditions.Figure optionsDownload full-size imageDownload high-quality image (235 K)Download as PowerPoint slide

Keywords
Montmorillonite; Solid acid catalysts; β-Amino alcohols; β-Alkoxy alcohols; Ring opening of epoxides
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Modified Montmorillonite clay catalyzed regioselective ring opening of epoxide with amines and alcohols under solvent free conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 487, October 2014, Pages 195–201
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