Pd(0)‐Catalyzed Decarboxylative Coupling and Tandem C—H Arylation/Decarboxylation for the Synthesis of Heteroaromatic Biaryls.

In the presence of carbene complex PAL, the acids (I) and (IV) undergo decarboxylative coupling with aryl bromides as a new and regioselective access to heteroaromatic biaryls like (III) and (V).