The intention of our research is to contribute to the field of synthetic phosphorus chemistry both, inorganic and organic, by identifying and developing highly-reactive phosphorus reagents that can be potentially regenerated. Here we would like to present a convenient and smooth protocol for the conversion of the resistant P�O bond in phosphane oxides wastes into a reactive P�N bond of synthetically useful pyrazolylphosphonium salts by a highly-charged, oxophilic  phosphorus-centered trication.[1] The reactions are successfully conducted at room temperature with quantitative yields. The protocol aims towards greener and more efficient processes for the use of waste materials such as phosphane oxides, to recover the phosphorus after its use. Using novel and powerful phosphorus reagents, new concepts for more efficient, selective and sustainable synthetic procedures will be developed.[2]References:  [1] J. J. Weigand, K.-O. Feldmann, A. K. C. Echterhoff, A. Ehlers, K. Lammertsma; Angew. Chem. Int. Ed. 2010 , 49, 6178-6181.[2] K.-O. Feldmann, S. Schulz, F. Klotter, Jan J. Weigand; ChemSusChem 2011 ,  in press.

Novel and powerful phosphorus reagents - new concepts for more efficient, selective and sustainable synthetic procedures

243rd National Meeting (2012)

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