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The Chemistry of Phosphazenes. Synthetic Applications of Cα-Lithiated Derivatives

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Phosphazenyl-stabilized carbanions are polyfunctional synthons, which combine in the same molecule a nucleophilic center adjacent to the phosphorus atom with a variety of functional groups linked to the nitrogen atom. The substituents on the nitrogen have the capability of tuning the reactivity of the anion and may also intervene at a given point of the synthetic pathway. This is a distinguishing feature of Cα-lithium phosphazenes with respect to all other phosphorus-stabilized carbanions: they have found application in organic (as for example, in the synthesis of olefins, functionalized open-chain compounds, heterocycles containing phosphorus atoms either in the ring or as appendages of the cyclic system) and inorganic chemistry (e.g. preparation of novel catalysts and polymers with improved properties with respect to the parent polymer).

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Keywords: Phosphazenes; carbanions; heterocycles; olefination; phosphazenyl metal complexes; polyphosphazenes

Document Type: Research Article

Affiliations: Area de Quimica Organica, Universidad de Almeria, Carretera de Sacramento s/n, 04120 Almeria, Spain.

Publication date: May 1, 2006

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  • Current Organic Synthesis publishes in-depth reviews on all areas of synthetic organic chemistry i.e. asymmetric synthesis, organometallic chemistry, novel synthetic approaches to complex organic molecules, carbohydrates, polymers, protein chemistry, DNA chemistry, supramolecular chemistry, molecular recognition and new synthetic methods in organic chemistry. The frontier reviews provide the current state of knowledge in these fields and are written by experts who are internationally known for their eminent research contributions. The journal is essential reading to all synthetic organic chemists. Current Organic Synthesis should prove to be of great interest to synthetic chemists in academia and industry who wish to keep abreast with recent developments in key fields of organic synthesis.
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