On August 3, 2020, Newar, Rajashree; Begum, Wahida; Antil, Neha; Shukla, Sakshi; Kumar, Ajay; Akhtar, Naved; Balendra; Manna, Kuntal published an article.Quality Control of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate The title of the article was Single-Site Cobalt-Catalyst Ligated with Pyridylimine-Functionalized Metal-Organic Frameworks for Arene and Benzylic Borylation. And the article contained the following:
A highly active single-site heterogeneous cobalt-catalyst is reported based on a porous and robust pyridylimine-functionalized metal-organic frameworks (pyrim-MOF) for chemoselective borylation of arene and benzylic C-H bonds. The pyrim-MOF having UiO-68 topol., constructed from zirconium-cluster secondary building units and pyridylimine-functionalized dicarboxylate bridging linkers, was metalated with CoCl2 followed by treatment of NaEt3BH to give the cobalt-functionalized MOF-catalyst (pyrim-MOF-Co). Pyrim-MOF-Co has a broad substrate scope, allowing the C-H borylation of halogen-, alkoxy-, alkyl-substituted arenes as well as heterocyclic ring systems using B2pin2 or HBpin (pin = pinacolate) as the borylating agent to afford the corresponding arene- or alkyl-boronate esters in good yields. Pyrim-MOF-Co gave a turnover number (TON) of up to 2500 and could be recycled and reused at least 9 times. Pyrim-MOF-Co was also significantly more robust and active than its homogeneous control, highlighting the beneficial effect of active-site isolation within the MOF framework that prevents intermol. decomposition The exptl. and computational studies suggested (pyrim•-)CoI(THF) as the active catalytic species within the MOF, which undergoes a mechanistic pathway of oxidative addition, turnover limiting σ-bond metathesis, followed by reductive elimination to afford the boronate ester. The pyridylimine-functionalized metal-organic framework (pyrim-MOF)-based single-site cobalt-catalyst is efficient for chemoselective borylation of arene and benzylic C-H bonds. The heterogeneous MOF-catalyst is significantly more robust and active than its homogeneous control, highlighting the beneficial effect of active-site isolation within the MOF framework that prevents intermol. decomposition The experimental process involved the reaction of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate(cas: 1312703-30-2).Quality Control of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate
The Article related to metal organic framework cobalt catalyst zirconium pyridylimine arene benzylic, borylation oxidation dft mechanism, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.Quality Control of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate
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