A recyclable rhodium catalyst anchored onto a bipyridine covalent triazine framework for transfer hydrogenation of N-heteroarenes in water. Issue 8 (5th April 2023)

• Record Type: Journal Article
• Authors: Everaert, Jonas; Leus, Karen; Rijckaert, Hannes; Debruyne, Maarten; Van Hecke, Kristof; Morent, Rino; De Geyter, Nathalie; Van Speybroeck, Veronique; Van Der Voort, Pascal; Stevens, Christian V.
• Is Part Of: Green chemistry. Volume 25:Issue 8(2023)
• Page Start: 3267
• Page End: 3277
• Publication Date: 2023-04-05
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d3gc00167a
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : Bipyridine covalent triazine framework (bpyCTF) was used as a support material for the development of a highly efficient Rh catalyst. The heterogeneous catalyst was applied for both batch and flow transfer hydrogenation of various N-heteroarenes. Abstract : Covalent triazine frameworks (CTFs) based on polydentate ligands are highly promising supports to coordinate well-defined active metal complexes, hereby combining the well-known reactivity of homogeneous catalysts with the robustness and recyclability of heterogeneous catalysts. Herein, we describe the immobilization of a half-sandwich Rh(iii ) complex onto a bipyridine-based CTF and its application for the transfer hydrogenation of N-heteroarenes in water with benign sodium formate as the hydrogen source. The heterogenized catalyst exhibited excellent activity toward a wide variety of quinoxalines and various other N-heteroarenes. Moreover, the catalyst maintained high activity during recycling and could be implemented in a continuous flow synthesis.