Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/229541
Kinetico-Mechanistic Studies of Cu(II)-Mediated Cyclizationof Imines via C-H Bond Activations
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Herein, we focus on the kinetico-mechanistic studies of a carboxylate and Cu(II)-assisted synthesis of imidazo[1,5-a]pyridines encompassing C(sp3)−H amination and cyclization of imines coupled with C(sp2)−H cyanation using time-resolved UV-Vis reaction monitoring and ex-situ analyses. Thus, kinetic studies have been carried out, providing a proof of the elementary steps involved, allowing for batch analysis of the compounds present in solution via MS. The experimental data obtained are consistent with the formation of a cyclometalated complex (k1) involving a C(sp3)−H bond cleavage followed by a reductive elimination/proton abstraction event (k2), both showing high enthalpy-demanding transition states. The two processes show a well-defined Eyring behavior with values of ΔH≠ and ΔS≠ within the expected range. Further insights on the intermediate fast C(sp2)–cyanation are also presented together with control reactions.
Matèries (anglès)
Citació
Citació
PLA, Daniel, et al. Kinetico-Mechanistic Studies of Cu(II)-Mediated Cyclizationof Imines via C-H Bond Activations. European Journal of Inorganic Chemistry. 2024. Vol. 27, num. 36, pags. 1-8. ISSN 1434-1948. [consulted: 31 of May of 2026]. Available at: https://hdl.handle.net/2445/229541