RT info:eu-repo/semantics/article
T1 [2,2′-Bipyridin]-6(1H)-one, a Truly Cooperating Ligand in the Palladium-Mediated C–H Activation Step: Experimental Evidence in the Direct C-3 Arylation of Pyridine
A1 Salamanca Verdugo, Vanesa
A1 Toledo Pérez, Alberto
A1 Albéniz Jiménez, Ana Carmen
K1 Química
K1 2303 Química Inorgánica
K1 2306 Química Orgánica
AB The ligand [2,2′-bipyridin]-6(1H)-one (bipy-6-OH) has a strong accelerating effect on the Pd- catalyzed direct arylation of pyridine or arenes. The isolation of relevant intermediates and the study of their decomposition unequivocally show that the deprotonated coordinated ligand acts as a base and assists the cleavage of the C−H bond. Mechanistic work indicates that the direct arylation of pyridine with this ligand occurs through a Pd(0)/Pd(II) cycle. Because of this dual ligand− intramolecular base role, there is no need for an available coordination site on the metal for an external base, a difficulty encountered when chelating ligands are used in coupling reactions that involve a C−H cleavage step.
PB American Chemical Society
SN 0002-7863
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/37805
UL http://uvadoc.uva.es/handle/10324/37805
LA eng
NO J. Am. Chem. Soc. 2018, 140, 17851−17856
NO Producción Científica
DS UVaDOC
RD 22-dic-2024