Catalytic Properties of Nickel, Deposited on Activated Carbon by Low-Temperature Decomposition of Nickel(0) Complex, in the Processes of Hydrogenation of Quinoline and its Derivatives

Abstract

The catalyst for hydrogenation of organic compounds has been prepared by low-temperature decomposition of complex Ni(COD)(DQ) (COD = 1.5-cyclooctadiene, DQ = duroquinone) in a solution in presence of activated carbon Norit. The catalyst is characterized by high dispersion of nickel-containing particles. It is shown that hydrogenation of quinoline to 1,2,3,4-tetrahydroquinoline in presence of the obtained catalyst occurred with 99 % yield in the case if the catalyst formed in the reaction mixture in situ, or ca. 40 %, if the catalyst had prior contact with air. It has been shown that other substituted quinolines could be hydrogenated in presence of the developed nickel-containing system.