Pd/Cu-Catalyzed Dehydrogenative Coupling of Dimethyl Phthalate: Synchrotron Radiation Sheds Light on the Cu Cycle Mechanism was written by Kanazawa, Yuki;Mitsudome, Takato;Takaya, Hikaru;Hirano, Masafumi. And the article was included in ACS Catalysis in 2020.HPLC of Formula: 14781-45-4 This article mentions the following:
Pd/Cu-catalyzed dehydrogenative coupling of di-Me phthalate is an important industrial process for the production of aromatic polyimide precursors. Nonetheless, the detailed mechanism of the Cu cycle has remained unclear. The present study describes the detailed mechanism of the Cu cycle in the [Pd(OAc)2]/Cu(OAc)2/1,10-phenanthroline (phen) system. The solution-phase X-ray absorption fine structure anal. of the catalyst solutions and the FEFF fitting as well as the evaluation of the catalytic and stoichiometric reactions reveal the following observations: (i) the major intermediate in the catalytic cycle is a mononuclear divalent [Cu(OAc)2]·2H2O species, (ii) coordination of the phen ligand to the Cu catalyst significantly inhibits the catalytic activity, (iii) 2 equiv of Cu(OAc)2·H2O oxidizes the zerovalent “Pd(phen)” species to divalent [Pd(OAc)2(phen)], and (iv) the divalent [Cu(OAc)2]2·2AcOH species is regenerated by the treatment of monovalent Cu(OAc) with AcOH in air. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4HPLC of Formula: 14781-45-4).
copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to low toxicity and inexpensive, earth-abundant. Due to these characteristics, copper nanoparticles have generated a great deal of interest especially in the field of catalysis. HPLC of Formula: 14781-45-4
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”