<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The Rh(I)‐catalyzed carbonylative Pauson—Khand‐type [2 + 2 + 1] cycloaddition of bis(allene)s with substituent at the allenic terminus produces 8‐substituted bicyclo[5.3.0]decadienone frameworks in good yields.</p> </abstract>