title: Cobalt-Catalyzed Regioselective Borylation of Arenes: N-Heterocyclic Silylene as an Electron Donor in the Metal-Mediated Activation of C-H Bonds.
abstract: C-H Borylation of arenes has been a subject of great interest recently because of its atom-economy and the wide applicability of borylated products in value-added synthesis. A new bis(silylene)cobalt(II) complex bearing a bis(N-heterocyclic silylene)-pyridine pincer ligand (SiNSi) has been synthesized and structurally characterized. It enabled the regioselective catalytic C-H borylation of pyridines, furans, and fluorinated arenes. Notably, it exhibited complementary regioselectivity for the borylation of fluorinated arenes compared to previously known catalytic systems, demonstrating that N-heterocyclic silylene donors have enormous potential in metal-catalyzed catalytic applications.
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Ren
authors.affiliation: Department of Chemistry: Metalorganics and Inorganic Materials Sekr C2, Technische Universität Berlin, Strasse des 17. Juni 135, Berlin, 10623, Germany.
authors.forename: Yu-Peng
authors.initials: YP
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.
authors.forename: Yunping
authors.initials: Y
authors.lastname: Bai
authors.affiliation: State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.|Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, P. R. China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Cui
authors.affiliation: Department of Chemistry: Metalorganics and Inorganic Materials Sekr C2, Technische Universität Berlin, Strasse des 17. Juni 135, Berlin, 10623, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Driess
keywords: C−H borylation; cobalt; pincer ligand; silicon; silylene