Synthesis and catalytic properties of novel ruthenium N-heterocyclic-carbene complexes

Palladium N-heterocyclic carbene complexes: Synthesis, characterization and catalytic properties in amination

“…Imidazolinium salts (1) prepared according to the literature [16]. The palladium complexes were prepared by means of Ag-carbene-transfer method developed by Wang and Lin [17].…”

Direct C—H Bond Activation of Benzoxazole and Benzothiazole with Aryl Bromides Catalyzed by Palladium(II)‐N‐heterocyclic Carbene Complexes

“…Palladium-catalyzed direct arylation reactions are the most widely used method for the formation of C(sp 2 )-C(sp 2 ) bond, [34,35] but several contributions have also been reported using ruthenium catalysis, [36][37][38][39] or other transitions-metals. [40][41][42] Early examples of palladium-catalyzed direct arylation were reported by Ames et al [43] Then, palladium-catalyzed direct arylation of an azole ring was first accomplished by Ohta et al [44] Later development in this area focused on intermolecular direct arylation and expanded the substrate scope to include various (hetero)arenes containing directing groups and electron-deficient arenes.…”

Solvent and Base in One: Tetra‐n‐butylammonium Acetate as a Multi‐Purpose Ionic Liquid Medium for Ru‐Catalyzed Directed Mono‐ and Di‐o‐C–H Arylation Reactions

“…Theoretical yield for both products: 0.50 mmol. -[1,1′-biphenyl]-2-yl)pyridine (3s) and 2-(4,4′′-Dimethyl-[1,1′:3′,1′′- general procedure from 2-phenylpyridine (1; 86 μL, 93 mg, 0.6 mmol) and p-bromotoluene (2s; 62 μL, 86 mg, 0.5 mmol), 3s [27] (white semi-solid; 75 mg, 61 %) and 4s [19] (7 mg, 8 %) were obtained after flash chromatography (petroleum ether/EtOAc = 30:1→10:1). The 1 H NMR spectroscopic data for both products was identical with those reported in the literature.…”