13625-90-6Relevant academic research and scientific papers
Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: A highly selective and general approach to 2,4-disubstituted phospholes
Bousrez, Guillaume,Jaroschik, Florian,Martinez, Agathe,Harakat, Dominique,Nicolas, Emmanuel,Le Goff, Xavier F.,Szymoniak, Jan
supporting information, p. 10997 - 11004 (2013/09/12)
Mixtures of 2,4- and 2,5-disubstituted zirconacyclopentadienes were obtained by the reductive dimerisation of terminal alkynes using the Cp 2ZrCl2/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. The Royal Society of Chemistry 2013.
