RT journal article
T1 Functionalized N‑Heterocyclic Carbene Nonspectator Ligands upon Internal Alkyne Activation Reactions
A1 Valerga, Pedro
A1 Puerta Vizcaino, María del Carmen
A1 Valerga Jiménez, Pedro Sixto
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
AB When studying the activation of 3-arylpropiolates by [TpRu(picolyl-RI)Cl]/NaBArF 4 (picolyl-MeI = 3-methyl-1-(2- picolyl)imidazol-2-ylidene (1); picolyl-MeBI = 3-methyl-1-(2- picolyl)benzoimidazol-2-ylidene (2)) a migratory insertion of the NHC into a ruthenium−carbon bond and an unprecedented C−N bond activation of the chelating picolyl-NHC ligand take place to give the new ruthenium metallacycles [TpRu(κ3-C,N,N′- =C(Ph) =C(CH2Py)(CO2Me)(MeI)][BArF 4] 3a and 4a and [TpRu(κ3-C,N,N′-=C(4-CF3Ph) = C(CH2Py)(CO2Me)(MeI)]- [BArF 4] 3b and 4b. X-ray crystal structures of 3a and 3b are reported, and a mechanistic pathway is proposed. In contrast, activation of internal alkynones by a mixture of [TpRu(picolyl-MeI)Cl] complex (1) and NaBArF 4 led to isolation and characterization of the corresponding disubstituted vinylidene complexes. Also, structures of [TpRu(picolyl-MeI)(= CC(COR)(Ph)][BArF 4] (R = Me (6a); Ph (6b)) are reported.
PB ACS Publications
YR 2013
FD 2013-05
LK http://hdl.handle.net/10498/20431
UL http://hdl.handle.net/10498/20431
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026