One‐pot sequentialHeckreduction–cyclization (HRC) reactions leading to the synthesis of substituted 2‐quinolones have been developed by using a heterogeneous or mixed homogeneous/heterogeneous multitaskpalladiumcatalyst with charcoal as a support. The whole sequence occurs under very mild conditions without the need for additives (ligand or base) by taking advantage of the high reactivity of aryldiazonium