Hong-Gyu Seong, Todd Emrick and Thomas P. Russell recently published an article entitled "Degradable polyolefins prepared by integration of disulfides into metathesis polymerizations with 3,6-dihydro-1,2-dithiine" in Chemical Science. In this work a 6-membered disulfide-containing cyclic olefin was synthesized via one-step RCM and used in ROMP copolymerizations with various cyclic olefins.