Chemoselective Hydrogenation of Aromatic Chloronitro Compounds with Amidine Modified Nickel Catalysts.

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

“…However, the situation is different for advanced functionalized nitro compounds containing carbon–carbon or carbon-heteroatoms multiple bonds, halogen atoms, carboxylic acid derivatives, or heterocycles. Unfortunately, for such substrates standard catalytic systems relying on Ni-Raney and especially noble metals such as Pd and Pt (Adams’ catalyst, PtO 2 ) do not show sufficient selectivities. − Examples of critical substrates are reported in Scheme .…”

General and selective reductive amination of carbonyl compounds using a core–shell structured Co3O4/NGr@C catalyst

“…In general, the hydrogenation of nitroarenes to functionalized anilines is wellknown with many benchmark catalytic systems. [6][7][8][9] It can be achieved with modified noble metal catalysts such as gold, 10,11 palladium or platinum onto activated carbon or alumina, 4,12-14 Pt(IV)oxide 15 as well as rhodium-or rutheniumsulfides. 1,16 Other classical catalytic systems like RANEY® nickel, 6,17 Ni/TiO 2 18 or Ni supported on kieselgur 19 have also been reported.…”

Novel ZnX2-ModulatedPd/C and Pt/C Catalysts for Chemoselective Hydrogenationand Hydrogenolysis of Halogen-Substituted Nitroarenes,Alkenes, Benzyl Ethers, and Aromatic Ketones

“…[1][2][3] However, the more expensive platinum or toxic nickel-based catalysts are required. Various additives such as MgO, 3,4a morpholine, 3,4 polyamines, 3 amidine, 5 phosphorous acid and its derivatives, 3,4b metal ions (salt), 6 and a combination of inorganic/organic phosphorous with a vanadium compound 7 have been employed as catalyst modifiers over commercially available catalysts. These additives often have their drawbacks such as limited scope, low chemoselectivity, low reaction rate, undesired side reactions, difficult separation of the additives, cost, and toxicity.…”