Practical Ruthenium Catalysts for the Synthesis of Cyclic Olefin Oligomers, Polymers, and their Hydrogenated Derivatives

Herein, we demonstrate the efficient ring‐opening metathesis polymerization (ROMP) of cyclic dienes and olefins catalyzed by several ruthenium–arene complexes as well as commercially available Grubbs‐type catalysts. The molecular mass and polydispersity of the oligomers was effectively controlled with the aid of different chain‐transfer agents. Furthermore, a highly practical and scalable sequential one‐pot synthesis method was successfully established to obtain hydrogenated ROMP oligomers with a homogenous hydrogenation catalyst.