Iron-Catalysed C(sp2)-H Borylation Enabled by Carboxylate Activation

Autor: Luke Britton, Jamie H. Docherty, Andrew P. Dominey, Stephen P. Thomas
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Molecules, Vol 25, Iss 4, p 905 (2020)
Druh dokumentu: article
ISSN: 1420-3049
DOI: 10.3390/molecules25040905
Popis: Arene C(sp2)-H bond borylation reactions provide rapid and efficient routes to synthetically versatile boronic esters. While iridium catalysts are well established for this reaction, the discovery and development of methods using Earth-abundant alternatives is limited to just a few examples. Applying an in situ catalyst activation method using air-stable and easily handed reagents, the iron-catalysed C(sp2)-H borylation reactions of furans and thiophenes under blue light irradiation have been developed. Key reaction intermediates have been prepared and characterised, and suggest two mechanistic pathways are in action involving both C-H metallation and the formation of an iron boryl species.
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