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Updated: May 30, 2026
14:07
Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
Published on: October 3, 2014
The conversion of furans into phosphinines.
1Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 13, 2011
Summary
Researchers converted furan-based [4+2] cycloadducts into novel phosphinine complexes. These complexes exhibit unique structural properties and reactivity, offering new avenues in organophosphorus chemistry.
Area of Science:
- Organometallic Chemistry
- Heterocyclic Chemistry
- Synthetic Chemistry
Background:
- Furan compounds are versatile building blocks in organic synthesis.
- Tungsten carbonyl complexes are valuable catalysts and reagents.
- Phosphinine complexes represent an important class of organophosphorus compounds.
Purpose of the Study:
- To synthesize and characterize novel phosphinine complexes derived from furan-based cycloadducts.
- To investigate the structural features and electronic properties of these complexes.
- To explore the reactivity and potential applications of the synthesized compounds.
Main Methods:
- [4+2] cycloaddition reactions between furan compounds and tungsten carbonyl complexes.
- Treatment of cycloadducts with boron tribromide (BBr(3)) and triethylamine or water.
- X-ray crystallographic analysis to determine molecular structures.
- Reactions involving methylation, silylation, acylation, triflation, and decomplexation.
Main Results:
- Successful conversion of [4+2] cycloadducts into 2-hydroxy- and 2-bromophosphinine tungsten complexes.
- X-ray structure of a 2-phosphaphenol complex revealed coplanarity of the hydroxy group and π-conjugation, leading to P-C(OH) bond lengthening.
- Methylation disrupted aromaticity, while silylation, acylation, and triflation retained it.
- Decomplexation yielded the free 2-phosphaphenol.
- Comparison indicated 2-bromophosphinine is a superior ligand to 2-chlorophosphinine.
- Treatment with BBr(3) and water yielded a tetrahydrophosphinine derivative, which formed a seven-membered phosphaoxepin.
Conclusions:
- The study demonstrates a novel synthetic route to functionalized phosphinine complexes.
- The structural and electronic properties of these complexes are influenced by substituents and metal coordination.
- The reactivity studies highlight the potential for further derivatization and application of these organophosphorus compounds.
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