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Paper

Org. Biomol. Chem., 2009, 7, 4777 - 4781, DOI: 10.1039/b911589g

Rediscovering copper-based catalysts for intramolecular carbon–hydrogen bond functionalization by carbene insertion

Carmen Martín, Tomás R. Belderraín and Pedro J. Pérez

A series of TpxCu complexes (Tpx = 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 TpBr3 or TpMs have provided activities and selectivities for these transformations comparable with or, in some cases, better than the well-known rhodium catalyst Rh2(OAc)4.

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