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Calixarene-proline functionalized iron oxide magnetite nanoparticles (Calix-Pro-MN): An efficient recyclable organocatalyst for asymmetric aldol reaction in water

Paper ID Volume ID Publish Year Pages File Format Full-Text
39202 45812 2015 8 PDF Available
Title
Calixarene-proline functionalized iron oxide magnetite nanoparticles (Calix-Pro-MN): An efficient recyclable organocatalyst for asymmetric aldol reaction in water
Abstract

•Calix[4]arene proline-grafted magnetic nanoparticles are becoming hot topic.•A novel calix[4]arene proline appended magnetic nanoparticles has been synthesized.•Calix-Pro-MN can catalyze aldol reactions between cyclohexanone and aromatic aldehydes.•High enantioselectivities (up to 93% ee) and diastereoselectivities (up to 97:3) were obtained.•The catalyst is easily separated using an external magnetic field and reused for several times.

Calix[4]arene-based chiral organocatalyst derived from L-proline supported onto well-defined (15 ± 3 nm) magnetic Fe3O4 nanoparticles was used as a highly active, recoverable, and reusable catalyst for the asymmetric aldol reaction in water without need for organic solvents. The chiral organocatalyst showed high catalytic activity (up to 94%), enantioselectivity (up to 93%) and diastereoselectivity (up to 97:3) for the reaction between cyclohexanone and aromatic aldehydes. The catalyst could easily separated using an external magnetic field and reused for several times without any significant loss of activity.

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Keywords
Calix[4]arene; Magnetic nanoparticles; Organocatalysis; Aldol; Water
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Calixarene-proline functionalized iron oxide magnetite nanoparticles (Calix-Pro-MN): An efficient recyclable organocatalyst for asymmetric aldol reaction in water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 499, 25 June 2015, Pages 205–212
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
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Online Support
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