Synthesis 2022; 54(22): 5077-5088
DOI: 10.1055/s-0041-1737882
paper

Biaryl Coupling of Aryldiazonium Salts and Arylboronic Acids Catalysed by Gold

Ignacio Medina-Mercado
,
This work was supported by the Consejo Nacional de Ciencia y Tecnología (CONACyT) (A1-S-7805), and Dirección General de Asuntos del Personal Académico (DGAPA), Universidad Nacional Autónoma de México (IN208120). I.M.-M. thanks CONACyT for a scholarship (701363).


Abstract

A gold-catalysed coupling of aryldiazonium salts with arylboronic acids is described. The reactions proceed in satisfactory yields under irradiation with blue LEDs in the presence of KF and a catalytic amount of ascorbic acid. Notably, 4-nitrobenzendiazonium tetrafluoro­borate is sufficiently reactive to undergo the coupling with a variety of arylboronic acids in the absence of aryl radical initiators. The coupling is applicable for electron-donating and electron-withdrawing groups present at the para, ortho, and meta positions of both substrates.

Supporting Information



Publication History

Received: 14 December 2021

Accepted after revision: 13 January 2022

Article published online:
24 February 2022

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