Facile migratory insertion of a N-heterocyclic carbene into a ruthenium-carbon double bond: a new type of reaction of a NHC ligand.
The reaction of [RuCp(IPri)(CH3CN)2]PF6 (IPri = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) with HCCR (R = COOMe, COOEt, COMe) yields the allyl carbene complexes [RuCp(=C(R)-eta3-CHC(R)CH-IPri)]PF6. This conversion involves selective head-to-tail coupling of two alkynes and an unusual migratory insertion of the N-heterocyclic carbene into the ruthenium-carbon double bond of a ruthenacyclopentatriene intermediate.
Becker
Eva
E
Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
Stingl
Verena
V
Dazinger
Georg
G
Puchberger
Michael
M
Mereiter
Kurt
K
Kirchner
Karl
K