RT Journal Article T1 Rediscovering copper-based catalysts for intramolecular carbon–hydrogen bond functionalization by carbene insertion A1 Martín Gandul, Carmen A1 Rodríguez Belderraín, Tomás A1 Pérez Romero, Pedro José AB A series of Tp(x)Cu complexes (Tp(x) = hydrotrispyrazolylborate ligand) have been tested as catalysts for the decomposition of several diazoacetates and N,N-disubstituted diazoacetamides and the subsequent formation of lactones and lactams, respectively. The complexes containing the ligands Tp(Br3) or Tp(Ms) have provided activities and selectivities for these transformations comparable with or, in some cases, better than the well-known rhodium catalyst Rh(2)(OAc)(4) PB Royal Society of Chemistry SN 1477-0520 SN 1477-0539 (electrónico) YR 2009 FD 2009 LK https://hdl.handle.net/10272/22794 UL https://hdl.handle.net/10272/22794 LA eng NO Martín, C., Belderraín, T. R., & Pérez, P. J. (2009). Rediscovering copper-based catalysts for intramolecular carbon–hydrogen bond functionalization by carbene insertion. In Organic & Biomolecular Chemistry (Vol. 7, Issue 22, p. 4777). Royal Society of Chemistry (RSC). https://doi.org/10.1039/b911589g NO We thank the MEC (Proyecto CTQ2008-00042/BQU) and theJunta de Andalucía (Proyecto P07-FQM-02794) for financialsupport. CM thanks the Universidad de Huelva (Plan Propio deInvestigacion) for a research fellowship DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026