Michael R. Chapman, Christopher M. Pask, Alireza Ariafard and Charlotte E. Willans
Chem. Commun., 2015,51, 5513-5515
DOI:
10.1039/C4CC10163D,
Communication
An unusual cyclometallation reaction at palladium is described, which proceeds via C–H functionalisation of a vinylic C(sp2)–H bond tethered to an NHC ligand. The energetic balance between palladacycle formation and bis-NHC complexation has been found to be very subtle.