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Updated: Sep 26, 2025
08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
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Carbodiphosphorane-Stabilized Parent Dioxophosphorane: A Valuable Synthetic HO2P Source
Zhizhou Liu1,2, Alasdair I McKay1, Lili Zhao3
1School of Chemistry, Faculty of Sciences, Monash University, Clayton 3800, Australia.
Journal of the American Chemical Society
|April 18, 2022
Summary
Researchers stabilized a reactive phosphorus compound, hexaphenylcarbodiphosphorane (CDP), to create a versatile phosphonylating agent. This agent successfully transferred the HPO2 fragment to various substrates, enabling new synthetic pathways.
Area of Science:
- Synthetic Chemistry
- Organophosphorus Chemistry
- Reaction Mechanisms
Background:
- Phosphorylation and phosphonylation are key synthetic transformations.
- Stabilizing highly reactive phosphorus intermediates is challenging.
- Dioxophosphoranes are extremely reactive phosphorus species.
Purpose of the Study:
- To stabilize the least thermodynamically favorable isomer of HO2P.
- To develop a versatile phosphonylating agent for synthetic applications.
- To investigate the reaction mechanism for delivering the HO2P unit.
Main Methods:
- Stabilization of HO2P using electron-rich hexaphenylcarbodiphosphorane (CDP).
- Characterization of the resulting monomeric CDP·PHO complex.
- Reaction of CDP·PHO with various substrates (alcohols, amines, carboxylic acids, water).
- Isolation and characterization of novel phosphorus-containing products.
- Computational studies to elucidate reaction pathways.
Main Results:
- Monomeric CDP·PHO was successfully synthesized and characterized.
- CDP·PHO demonstrated versatility as a phosphonylating agent, transferring the HPO2 fragment.
- New phosphorus-based compounds were synthesized and characterized for the first time.
- Computational analysis indicated an addition-elimination pathway is favored over elimination-addition.
Conclusions:
- Hexaphenylcarbodiphosphorane (CDP) effectively stabilizes reactive HO2P species.
- The CDP·PHO complex serves as a novel and versatile phosphonylating agent.
- This approach provides a new route for synthesizing various phosphorus-containing molecules.
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