Calcium-Ligand Cooperation Promoted Activation of N 2 O, Amine, and H 2 as well as Catalytic Hydrogenation of Imines, Quinoline, and Alkenes.

Autor: Liang Y; Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 7610001, Israel., Efremenko I; Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 7610001, Israel., Diskin-Posner Y; Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 7610001, Israel., Avram L; Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 7610001, Israel., Milstein D; Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 7610001, Israel.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2024 May 21; Vol. 63 (21), pp. e202401702. Date of Electronic Publication: 2024 Apr 19.
DOI: 10.1002/anie.202401702
Abstrakt: Bond activation and catalysis using s-block metals are of great significance. Herein, a series of calcium pincer complexes with deprotonated side arms have been prepared using pyridine-based PNP and PNN ligands. The complexes were characterized by NMR and X-ray crystal diffraction. Utilizing the obtained calcium complexes, unprecedented N 2 O activation by metal-ligand cooperation (MLC) involving dearomatization-aromatization of the pyridine ligand was achieved, generating aromatized calcium diazotate complexes as products. Additionally, the dearomatized calcium complexes were able to activate the N-H bond as well as reversibly activate H 2 , offering an opportunity for the catalytic hydrogenation of various unsaturated molecules. DFT calculations were applied to analyze the electronic structures of the synthesized complexes and explore possible reaction mechanisms. This study is an important complement to the area of MLC and main-group metal chemistry.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: