Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: a highly selective and general approach to 2,4-disubstituted phospholes.

Guillaume Bousrez; Florian Jaroschik; Agathe Martinez; Dominique Harakat; Emmanuel Nicolas; X. Le Goff; Jan Szymoniak

Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: a highly selective and general approach to 2,4-disubstituted phospholes.

Guillaume Bousrez ¹ Florian Jaroschik ¹ Agathe Martinez ¹ Dominique Harakat ¹ Emmanuel Nicolas ² X. Le Goff ² Jan Szymoniak ¹

1 ICMR - Institut de Chimie Moléculaire de Reims - UMR 7312

2 DCPH - Laboratoire Hétéroéléments et Coordination

Abstract : Mixtures of 2,4- and 2,5-disubstituted zirconacyclopentadienes were obtained by the reductive dimerisation of terminal alkynes using the Cp2ZrCl2/lanthanum system. Reactions of dihalophosphines with these mixtures afforded selectively the corresponding 2,4-disubstituted phospholes and 1,4-disubstituted butadienes. A new series of phospholes was characterized by multi-nuclear NMR spectroscopy and X-ray analysis. A possible explanation for the observed selectivity was obtained from X-ray studies and DFT analysis of the intermediate zirconacyclopentadienes.

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Journal articles

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Chemical Sciences / Inorganic chemistry

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Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: a highly selective and general approach to 2,4-disubstituted phospholes.

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Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: a highly selective and general approach to 2,4-disubstituted phospholes.

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