Light‐ and Manganese‐Initiated Borylation of Aryl Diazonium Salts: Mechanistic Insight on the Ultrafast Time‐Scale Revealed by Time‐Resolved Spectroscopic Analysis

James Firth, Anders Hammarback, Thomas Burden, Jonathan Eastwood, James Robert Donald, Chris Horbaczewskyj, Matthew McRobie, Adam Tramaseur, Ian P. Clark, Michael Towrie, Alan Robinson, Alan Robinson, Jean-Philippe Krieger, Jason Martin Lynam, Ian James Stewart Fairlamb

Research output: Contribution to journalArticlepeer-review


Manganese‐mediated borylation of aryl/heteroaryl diazonium salts emerges as a general and versatile synthetic methodology for the synthesis of the corresponding boronate esters. The reaction proved an ideal testing ground for delineating the Mn species responsible for the photochemical reaction processes, i.e. involving either Mn radical or Mn cationic species, which is dependent on the presence of a suitably strong oxidant. Our findings are important for a plethora of processes employing Mn‐containing carbonyl species as initiators and/or catalysts, which have much potential in synthetic applications.
Original languageEnglish
Number of pages9
JournalChemistry : A European Journal
Early online date1 Nov 2020
Publication statusE-pub ahead of print - 1 Nov 2020

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  • Manganese
  • Boron
  • Catalysis
  • radicals
  • metal cations

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