engleski

Copper(I)-catalysed homo-coupling of aryldiazonium salts : synthesis of symmetrical biaryls

Copper(I) triflate acts as an efficient stoichiometric reagent for the homo-coupling of aryldiazonium salts bearing electronwithdrawing group(s), to yield symmetrical biaryls in acetonitrile under mild reaction conditions. Aryldiazonium salts bearing electron-donating groups undergo the reaction by using catalytic amounts of a copper complex prepared in situ from copper(II) triflate and 2, 20-bipyridine with metallic copper as an ultimate reductant.

aryldiazonium salts; biaryl; copper(I) triflate

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