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Updated: Apr 22, 2026

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
Published on: September 8, 2013
Lithiated sulfoxides: α-sulfinyl functionalized carbanions
Gerd Ludwig1, Tobias Rüffer, André Hoppe
1Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany. dirk.steinborn@chemie.uni-halle.de.
This study details the synthesis of novel alpha-sulfinyl functionalized organolithium compounds using alkyl aryl sulfoxides and n-BuLi-TMEDA. These compounds exhibit unique structural features and undergo diastereoselective reactions with carbonyl compounds.
Area of Science:
- Organometallic Chemistry
- Organic Synthesis
- Sulfoxide Chemistry
Background:
- Alkyl aryl sulfoxides are versatile synthetic precursors.
- Organolithium compounds are crucial intermediates in organic synthesis.
Purpose of the Study:
- To synthesize and characterize novel alpha-sulfinyl functionalized organolithium compounds.
- To investigate the structural properties of these organolithium compounds.
- To explore the reactivity of these compounds in reactions with carbonyls.
Main Methods:
- Reaction of alkyl aryl sulfoxides with n-BuLi-TMEDA.
- Characterization using NMR spectroscopy (1H, 13C, 7Li).
- Single-crystal X-ray diffraction analysis.
Main Results:
- Formation of dinuclear alpha-sulfinyl functionalized organolithium compounds with Li2O2 rings.
- Identification of 'free' carbanions as the primary structural feature.
- High diastereoselectivity in reactions with benzaldehyde and benzophenone.
Conclusions:
- The synthesized organolithium compounds possess unique structural characteristics.
- These compounds serve as valuable intermediates for diastereoselective synthesis.
- The study provides insights into the reactivity and structural features of alpha-sulfinyl carbanions.
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