Ynamides: stable ligand equivalents of unstable oxazol-4-ylidenes (novel mesoionic carbenes).
Deprotonation of an oxazolium salt induces a ring opening process leading to the corresponding ynamide. Although the expected mesoionic carbene is not obtained, the acyclic ynamide readily reacts with various transition metals yielding robust mesoionic carbene complexes.
UCR-CNRS Joint Research Chemistry Laboratory (UMI 2957), Department of Chemistry, University of California, Riverside, CA 92521-0403, USA.
Gaël
G
Ung
Daniel
D
Mendoza-Espinosa
Guy
G
Bertrand