Ruthenium(II) complexes of the tetradentate polypyridyl thioether 1,2-bis[3′-(2″-pyridyl)-1′-thiapropyl]benzene
作者:GorDan T. Reeves、Anthony W. Addison、Matthias Zeller
DOI:10.1016/j.poly.2020.114367
日期:2020.3
Several new Ru(II) polypyridyl complexes of the novel tetradentate thioether 1,2-bis[3′-(2″-pyridyl)-1′-thiapropyl]benzene (Ppes) form from the dinuclear ruthenium(II) complex [Ru(Ppes)}2(µ-Cl)2]2+ via reaction with various bidentate diimines. Facile symmetrical bridge cleavage occurs, producing mononuclear complexes of the form [Ru(Ppes)(L)]2+, where L is the bidentate diimine. Redox chemistry shows single-electron
Intramolecular oxidative C–N bond formation under metal-free conditions: One-pot global functionalization of pyrazole ring
作者:Mohit K. Tiwari、Ashif Iqubal、Parthasarathi Das
DOI:10.1016/j.tet.2022.133059
日期:2022.11
of intermediate free-radical species followed by intramolecular oxidative C–N bondformation afforded the desired pyrazole moiety. The synthetic versatility of this methodology is further highlighted by preparing a diverse range of substrates including di-/tri-/and tetra-substituted pyrazoles, and applying the methodology in the practical synthesis of bioactive scaffolds.
Ligand-Controlled Ruthenium-Catalyzed Borrowing-Hydrogen and Interrupted-Borrowing-Hydrogen Methodologies: Functionalization of Ketones Using Methanol as a C1 Source
phosphine-free N,C–Ru and N,N–Ru catalysts for ligand-controlledborrowing-hydrogen (BH) and interrupted-borrowing-hydrogen (I-BH) methods, respectively. This protocol has been employed on a variety of ketonesusing MeOH as a green, sustainable, and alternative C1source to form a C–C bond through the BH and I-BH methods. Reasonably good substrate scope, functional group tolerance, and good-to-excellent yields