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Gold catalysed Suzuki-Miyaura coupling of arenediazonium o-benzenedisulfonimides
Authors:Margherita Barbero  Stefano Dughera
Institution:Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy
Abstract:Arenediazonium o-benzenedisulfonimides have been used as efficient electrophilic partners in Au(I) catalysed Suzuki coupling reactions. The synthetic protocol is general, easy and produced either biaryls or heteroaryl arenes in good yields (51 positive examples, average yield 80%). o-Benzenedisulfonimide was recovered at the end of the reactions and was reused to prepare the starting salts for further reactions. Mechanistic insights suggest that the o-benzenedisulfonimide anion act as an electron transfer agent and promotes a catalytic cycle which does not require the presence of photocatalysts or external oxidants.
Keywords:Diazonium salts  C-C coupling  Boronic acids  Gold catalysis  Au(I)/Au(III)  Electron transfer agent
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