2851-83-4Relevant articles and documents
Comparing Separation vs. Fresh Start to Assess Reusability of Pd/C Catalyst in Liquid-Phase Hydrogenation
Mironenko, Roman M.,Saybulina, Elina R.,Trenikhin, Mikhail V.,Izmailov, Rinat R.,Lotsman, Kristina A.,Rodygin, Konstantin S.,Ananikov, Valentine P.
, p. 3656 - 3661 (2021)
The reusability of metal catalysts is a key issue for the potential application of new catalysts in research and industrial practice. The most common procedure for testing catalyst reusability in liquid-phase heterogeneous reactions is based on separating a catalyst from a reaction mixture followed by the next run. An alternative procedure called “fresh start” consists of the addition of a new portion of reagents to the reaction mixture without any isolation operation. In this work, we compare both procedures in a model Pd/C-catalyzed hydrogenation with different heteroatoms, e. g., O-, S-, and N-vinyl derivatives. It was shown that regardless of whether the catalyst is stable or potentially poisoned during the reaction, both procedures lead to comparable results. It appears that a much easier implementation of a fresh start procedure may be an option of choice. The possibilities of using both procedures to rationalize the experimental protocol for assessing Pd/C catalyst reusability in liquid-phase hydrogenations are discussed.
Lewis acid-catalyzed reduction of dithioacetals by 1,4-cyclohexadiene
Ikeshita, Kei-ichiro,Kihara, Nobuhiro,Sonoda, Motohiro,Ogawa, Akiya
, p. 3025 - 3028 (2008/02/06)
Dithioacetals were reduced by 1,4-cyclohexadiene in the presence of a catalytic amount of Lewis acid to afford the corresponding sulfides in good yields.
