Recent Progress in Pd-Catalyzed Decarboxylative Coupling Reactions of (Hetero)aromatic Carboxylic Acids

Since carboxylic acids have distinguishing features of non-toxicity, low cost, ready availability and easy storage, Pd-catalyzed decarboxylative coupling reactions of (hetero)aromatic carboxylic acids have been obtained rapid development since this century, and have exhibited a tendency toward replacement of traditional coupling reactions.The coupling reactions of Pd-catalyzed decarboxylation of aromatic carboxylic acids with various substrates of olefins, aryl halides, arenes, aryltrifluoroborates and etc. are reviewed, and the relevant reaction mechanisms are discussed.