2026-04-13T14:23:59Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/3560472024-12-20T17:13:00Zcom_2072_300912com_2072_4427col_2072_301309

00925njm 22002777a 4500 dc Miceli, Claudia author Rintjema, Jeroen author Martin, Eddy author Escudero-Adán, Eduardo C. author Zonta, Cristiano author Licini, Giulia author Kleij, Arjan W. author 2017-02-16 Vanadium(V) complexes derived from aminotriphenolate ligands are demonstrated to be highly active catalysts for the coupling of various terminal and internal epoxides with carbon dioxide to afford a series of substituted organic carbonates in good yields. Intriguingly, a V(V) complex bearing peripheral chloride groups on the ligand framework allowed for the formation and isolation of a rare complex that incorporates a ring-opened epoxide with one of the phenolateO atoms acting as a nucleophile and the metal center as a Lewis acidic site. This unusual structure was characterized by X-ray diffraction and 51V-NMR, and was shown to exhibit catalytic activity for the coupling of propylene oxide and CO2 when combined post-synthetically with these substrates. The results obtained herein clearly show that vanadium complexes in a high oxidation state are powerful catalysts for the activation of challenging internal epoxides, and their conversion into cyclic organic carbonates. http://hdl.handle.net/2072/356047 https://doi.org/10.1021/acscatal.7b00109 Vanadium(V) Catalysts with High Activity for the Coupling of Epoxides and CO2: Characterization of a Putative Catalytic Intermediate