chemo‐selective Rh(II)/Pd(0) dual catalysis that promotes one‐pot synthesis of C3‐quaternary allylic oxindoles from N‐aryl‐α‐diazo‐β‐ketoamides and functionalized allyl carbonates in good to excellent yields has been developed. The efficiency of this transformation relies on the choice of Rh(II)/Pd(0) dual catalysis strategy that enabled cascade intramolecular aryl C−H insertion and allylic alkylation