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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.
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.
Cited literature [2 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-00839784
Contributor : Emmanuel Nicolas Connect in order to contact the contributor
Submitted on : Monday, July 1, 2013 - 8:45:11 AM
Last modification on : Tuesday, December 14, 2021 - 9:04:02 AM
Long-term archiving on: : Wednesday, October 2, 2013 - 4:10:41 AM
Contributor : Emmanuel Nicolas Connect in order to contact the contributor
Submitted on : Monday, July 1, 2013 - 8:45:11 AM
Last modification on : Tuesday, December 14, 2021 - 9:04:02 AM
Long-term archiving on: : Wednesday, October 2, 2013 - 4:10:41 AM
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