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Intramolecular Aryl Migration from Tin to Carbon via a Radical Atom-Transfer Process
Wakabayashi1, Yorimitsu, Shinokubo
1Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan.
Organic Letters
|July 13, 2000
Summary
This study details a novel triethylborane-induced aryl migration reaction. Organotin compounds undergo a radical atom-transfer process to form valuable phenylalkyltrimethylstannanes.
Area of Science:
- Organic Chemistry
- Radical Chemistry
- Organometallic Chemistry
Background:
- Intramolecular aryl migration reactions are crucial for synthesizing complex organic molecules.
- Radical-mediated transformations offer unique synthetic pathways.
- Organotin compounds are versatile reagents in organic synthesis.
Purpose of the Study:
- To describe a new method for triethylborane-induced intramolecular 1,4-aryl migration.
- To investigate the radical atom-transfer mechanism involving organotin substrates.
- To synthesize 3-phenylalkyltrimethylstannanes efficiently.
Main Methods:
- Treatment of 3-iodoalkyldimethylphenylstannanes with triethylborane (Et(3)B) in benzene.
- Induction of a carbon-centered radical intermediate.
- Subsequent addition of methylmagnesium iodide (MeMgI).
Main Results:
- Successful intramolecular 1,4-aryl migration from tin to a carbon-centered radical.
- Formation of 3-phenylalkyltrimethylstannanes in good yields.
- Demonstration of a radical atom-transfer process.
Conclusions:
- Triethylborane is an effective initiator for this aryl migration reaction.
- The described method provides a reliable route to substituted organotins.
- This work expands the scope of radical-mediated synthetic methodologies.