A brand-new Pd-mediated generation of benzyne and its [2+2+2] cycloaddition: δ-carbon elimination and concomitant decarboxylation

We found a brand-new method for the generation of aryne from methyl 2-bromobenzoates via the Pd-mediated concomitant δ-carbon elimination and decarboxylation. The generated arynes underwent Pd-mediated [2+2+2] cycloaddition to give triphenylenes.