Synthesis of six 8-quinolinate-based ruthenium complexes with high catalytic activity for nitroarene reduction

Postsynthetic Modification of Half-Sandwich Ruthenium Complexes by Mechanochemical Synthesis

“…The molecular structure of each complex was determined by X-ray crystallography and is shown in Figure , in which the chlorine atom, a nitrogen atom, and one oxygen atom each from the ligand and one of the p -cymene rings form a three-legged piano-stool geometry with Ru. The Ru–N distances [2.138(4) Å in 2 , 2.114(2) Å in 4a , and 2.124(3) Å in 4b ] are in the range of typical distances of half-sandwich ruthenium complexes with a 8-hydroxyquinoline derivative. − The Ru–Cl distances [2.4087(14) Å in 2 , 2.4186­(8) Å in 4a , and 2.4112(9) Å in 4b ] are consistent with the Ru–Cl bond length values reported for those of half-sandwich ruthenium complexes. − …”

Synthesis, characterization, and catalytic activity of half‐sandwich ruthenium complexes with pyridine/phenylene bridged NHC = E (NHC = N‐heterocyclic carbene, E = S, Se) ligands

“…[ 51,52 ] Half‐sandwich ruthenium complexes are also good candidates for the hydrogenation of nitro compounds due to their efficient catalytic performance. [ 53–56 ] To the best of our knowledge, half‐sandwich ruthenium complexes bearing NHC adducts have not been applied in transfer hydrogenation of nitro compounds using AB as the reducing agent.…”

Selective reduction of nitroarenes using Ru/C and CaH2

“…2 The relevance of this transformation lies in the importance of amines in the synthesis of pharmaceuticals, agrochemicals and dyes, as well as intermediates or building blocks for the fine chemicals industry. 3 Among the several methodologies developed for this pivotal transformation, including homogeneous catalysis, 4 metal-free reductions, 5 water–gas shift reaction, 6 and the use of nanoparticles, 7 the development of heterogeneous catalytic systems constitutes one of the most important approaches especially on an industrial scale, 8 probably because of the simple work-up procedure, which consists of filtration and concentration to isolate the product. Typical heterogeneous catalysts are noble and non-noble metals such as palladium, platinum, ruthenium, iron, copper, manganese, nickel etc .…”