raney nickel उदाहरण वाक्य

The resulting sodium salt of 1-( nitromethyl ) cyclohexanol is added to acetic acid and shaken with hydrogen gas in the presence of W-4 Raney nickel catalyst.
A high catalytic activity, coupled with the fact that hydrogen is absorbed within the pores of the catalyst during activation, makes Raney nickel a useful catalyst for many hydrogenation reactions.
The required 2-methyl-1, 3-cyclohexanedione can be prepared from resorcinol by hydrogenation over Raney nickel to dihydroresorcinol as the enolate followed by alkylation with methyl iodide.
Recently, it was found that Ni-B / MgO showed superior catalytic activity to that of Raney nickel and other common catalysts that have been used in the hydrogenation of sulfolene.
He was the developer of a nickel catalyst that became known as Raney nickel, which is often used in industrial processes and scientific research for the hydrogenation of multiple covalent bonds present in molecules.

Alternatively, the more generic terms " skeletal catalyst " or " sponge-metal catalyst " may be used to refer to catalysts that have physical and chemical properties similar to those of Raney nickel.
Desulfurisation took place with Raney nickel and the reduction reaction also opened the lactone ring to the carboxylic acid which was converted to the ester "'64 "'by reaction with diazomethane.
Hydrogenation with Raney nickel gives the diol "'9 "'which on a double Mitsunobu reaction ( with an amine proton donor ) gives the azafenestrane "'10 "'as the borane salt.
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The secondary alcohols ( e . g ., isopropanol, 2-butanol, 3-pentanol ) are obtained by hydrogenating over a catalyst ( e . g ., Raney nickel ) the corresponding ketones ( e . g ., acetone, methyl ethyl ketone, diethyl ketone ).