Title:
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Vanadium(V) Catalysts with High Activity for the Coupling of Epoxides and CO2: Characterization of a Putative Catalytic Intermediate
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Author:
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Miceli, Claudia; Rintjema, Jeroen; Martin, Eddy; Escudero-Adán, Eduardo C.; Zonta, Cristiano; Licini, Giulia; Kleij, Arjan W.
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Abstract:
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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 phenolateO 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. |
Publication date:
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2017-02-16 |
Subject(s):
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54 |
Rights:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Pages:
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2367 p. |
Document type:
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Article Article - Accepted version |
DOI:
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10.1021/acscatal.7b00109
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