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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Kinetic resolution in asymmetric epoxidation using iminium salt catalysis
Philip C Bulman Page1, Louise F Appleby, Yohan Chan
1School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, Norfolk NR4 7TJ, UK. p.page@uea.ac.uk
The Journal of Organic Chemistry
|July 19, 2013
Summary
This study introduces kinetic resolution for iminium salt-catalyzed epoxidation reactions. It achieves high enantioselectivity, up to 99% ee, in the epoxidation of cis-chromenes.
Area of Science:
- Organic Chemistry
- Catalysis
- Asymmetric Synthesis
Background:
- Epoxidation reactions are crucial for synthesizing valuable chemical intermediates.
- Kinetic resolution is a powerful strategy for obtaining enantiomerically enriched compounds from racemic mixtures.
- Iminium salt catalysis offers a versatile platform for various organic transformations.
Purpose of the Study:
- To report the first examples of kinetic resolution in epoxidation reactions catalyzed by iminium salts.
- To demonstrate the efficacy of this method in achieving high enantioselectivity.
- To explore the application of iminium salt catalysis in asymmetric epoxidation.
Main Methods:
- Utilized iminium salt catalysts for epoxidation reactions.
- Employed racemic cis-chromenes as substrates.
- Analyzed enantiomeric excess (ee) using chiral chromatography.
Main Results:
- Achieved successful kinetic resolution in epoxidation reactions.
- Obtained up to 99% enantiomeric excess (ee) in the epoxidation of racemic cis-chromenes.
- Established iminium salt catalysis as an effective method for asymmetric epoxidation.
Conclusions:
- The developed method represents the first successful kinetic resolution in iminium salt-catalyzed epoxidations.
- High enantioselectivity was achieved, highlighting the potential of this catalytic system.
- This work expands the scope of iminium salt catalysis in enantioselective synthesis.
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