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Oxidative cyclorelease from soluble polymeric supports.
Hua Liu1, Shuangyi Wan, Paul E Floreancig
1Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
The Journal of Organic Chemistry
|May 7, 2005
Summary
Single electron oxidation enables cyclization and cleavage of polymer-bound ethers. This method provides a traceless route for synthesizing aldehydes and ketones from alcohols and ethers on polymer supports.
Area of Science:
- Organic Chemistry
- Polymer Chemistry
- Synthetic Chemistry
Background:
- Polymer-bound reagents offer advantages in synthesis and purification.
- Homobenzylic ethers are common structural motifs in organic molecules.
- Efficient cleavage methods are crucial for polymer-supported synthesis.
Purpose of the Study:
- To investigate single electron oxidation for polymer-bound homobenzylic ether cleavage.
- To develop a traceless method for synthesizing polymer-supported aldehydes and ketones.
- To evaluate oligonorbornene polymers as stable supports for redox chemistry.
Main Methods:
- Single electron oxidation of polymer-bound homobenzylic ethers.
- Utilizing soluble oligonorbornene polymers as a support matrix.
- Isolation of products via methanol precipitation.
- Cleavage of secondary and tertiary alcohols and ethers.
Main Results:
- Concomitant cyclization and cleavage (cyclorelease) of polymer-bound homobenzylic ethers was achieved.
- Oligonorbornene polymers demonstrated stability under oxidative conditions.
- A new traceless approach for polymer-supported aldehyde and ketone synthesis was established.
Conclusions:
- Single electron oxidation is a viable strategy for cleaving polymer-bound homobenzylic ethers.
- Oligonorbornene polymers are suitable supports for redox-mediated synthetic transformations.
- The developed method offers a novel route to polymer-supported carbonyl compounds.