Selective mono- and dimetallation of a group 3 sandwich complex

Antonio J. Martínez-Martínez, Alan R. Kennedy, Valerie Paprocki, Felipe Fantuzzi, Rian D. Dewhurst, Charles T. O'Hara, Holger Braunschweig, Robert E. Mulvey

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The scandium Cp/COT hybrid sandwich compound [(η 5-C 5H 5)Sc(η 8-C 8H 8)] is resistant to metallation via conventional alkyllithium and lithium amide bases. In this work, clean, selective, stoichiometric and high-yielding mono- and dimetallation is accomplished using tandem trans-metal-trapping (TMT) involving LiTMP and iBu 2AlTMP with deprotonation occurring selectively at the Cp and Cp/COT rings respectively, providing the first examples of selective metallation of a sandwich complex featuring a group 3 element.

Original languageEnglish
Pages (from-to)9677-9680
Number of pages4
JournalChemical Communications
Issue number65
Early online date19 Jul 2019
Publication statusPublished - 21 Aug 2019


  • trans-metal-trapping
  • group 3 sandwich

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    Martínez-Martínez, A. J., Kennedy, A. R., Paprocki, V., Fantuzzi, F., Dewhurst, R. D., O'Hara, C. T., Braunschweig, H., & Mulvey, R. E. (2019). Selective mono- and dimetallation of a group 3 sandwich complex. Chemical Communications, 55(65), 9677-9680.