Transformations of arynes catalyzed by a transition-metal complex, although less common than stoichiometric reactions, [1] have recently received considerable attention as a novel route for the synthesis of substituted arenes that are not accessible by conventional methods. Irrespective of the catalyst and reactant used, efforts have thus far been devoted mainly to developing cyclization reactions of arynes. The pioneering work on these transformations-palladium-catalyzed trimerization of arynes [2] and cocyclization of arynes

Arynes are found to be facilely inserted into bis(pinacolato)diboron by using a platinum-isocyanide catalyst, affording diverse 1,2-diborylarenes, which can be converted into o-terphenyls via Suzuki-Miyaura coupling reaction.

Two molar amounts of arynes were found to insert into a Sn-Sn bond of a distannane in the presence of a sub-stoichiometric amount of a palladium-phosphite complex, affording straightforwardly 2,2'-distannylbiaryls.

Transformations of arynes catalyzed by a transition-metal complex, although less common than stoichiometric reactions, [1] have recently received considerable attention as a novel route for the synthesis of substituted arenes that are not accessible by conventional methods. Irrespective of the catalyst and reactant used, efforts have thus far been devoted mainly to developing cyclization reactions of arynes. The pioneering work on these transformations-palladium-catalyzed trimerization of arynes [2] and cocyclization of arynes

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