Triethylsulfonium iodide, CAS: 1829-92-1

Key Applications:

Alkylation Reagent in Organic Synthesis

• Acts as a controlled ethylating agent for oxygen-, nitrogen-, and sulfur‑based nucleophiles.
• Supports the synthesis of thioethers, amines, and heterocycles under mild conditions.
• Useful in mechanistic studies of sulfonium‑mediated alkyl transfer pathways.

Phase‑Transfer and Ion‑Exchange Chemistry

• Functions as a sulfonium‑based phase‑transfer catalyst in biphasic systems.
• Facilitates iodide exchange and nucleophile activation in polar–aprotic media.
• Employed in halide metathesis and quaternary onium salt preparation.

Precursor for Sulfur‑Centered Reactive Intermediates

• Generates sulfonium ylides for cyclopropanation, epoxidation, and rearrangement reactions.
• Supports development of sulfur‑based synthetic methodologies and mechanistic probes.

Photoinitiator and Cationic Polymerization Additive

• Serves as a component or precursor in onium‑salt photoinitiator systems.
• Enables cationic polymerization of epoxides, vinyl ethers, and oxetanes under UV exposure.
• Used in coatings, adhesives, and microfabrication resists requiring rapid cure profiles.

Materials and Electrochemical Research

• Investigated as a model sulfonium salt for ion‑pairing, conductivity, and solvation studies.
• Useful in evaluating iodide transport, redox behavior, and ion‑exchange equilibria.
• Supports development of functional materials where controlled cation–anion interactions are critical.

Synthetic Intermediate for Advanced Sulfur Compounds

• Precursor to sulfonium‑based ionic liquids, sulfur(VI) reagents, and functionalized sulfides.
• Enables modular construction of sulfur‑containing ligands and catalysts.

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