Tributylmethylphosphonium methylcarbonate, CAS: 120256-45-3

Key Applications:

CO₂‑Derived Chemistry & Green Carbonylation

• Functions as a reactive methylcarbonate donor in carbonylation, carboxymethylation, and carbonate‑forming reactions.
• Supports CO₂‑utilization pathways, particularly in systems where methylcarbonate anions act as masked CO₂ equivalents.
• Useful in developing sustainable synthesis routes for carbonates, carbamates, and alkyl carbonates.

Phase‑Transfer & Catalytic Media

• Acts as an efficient phase‑transfer medium for nucleophilic substitution, esterification, and alkylation reactions.
• Enhances reaction rates in biphasic and low‑polarity systems due to its high polarity and low volatility.
• Serves as a tunable solvent/catalyst hybrid in organophosphonium‑mediated transformations.

 Polymer & Materials Processing

• Employed as a processing aid and solvation medium for engineering polymers, including polycarbonates, polyurethanes, and cellulose derivatives.
• Supports polymer functionalization via carbonate exchange or mild alkylation pathways.
• Useful in membrane casting, ion‑conductive films, and surface modification workflows.

 Electrochemical & Energy Applications

• Provides a stable ionic environment for electrolyte formulation, especially where carbonate anions improve SEI formation or interfacial stability.
• Investigated in CO₂‑electroreduction, capacitive systems, and low‑volatility electrolytes requiring wide electrochemical windows.

 Extraction, Separation & Solvent Systems

• Effective in liquid–liquid extraction of metal ions, organics, and CO₂‑reactive species.
• Offers tunable polarity for selective separations, particularly where carbonate coordination or mild basicity is advantageous.
• Useful as a green solvent alternative in replacing volatile organic carbonates.

 Specialty Synthesis & Fine Chemicals

• Enables selective O‑methylation, carbonate exchange, and mild base‑promoted transformations.
• Serves as a reagent/medium for preparing functionalized carbonates, protected alcohols, and intermediate building blocks.

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