“…The quest for degradable, sustainable polymers from renewable resources is becoming an increased priority, along with and in efforts to address coincident events of plastic pollution, climate change, and the energy transition away from petroleum-based feedstocks. There has been an emphasis on developing chemical transformations involving molecular or macromolecular materials of natural origin to afford functional polymers, thereby advancing efforts toward achieving sustainability for the growing plastic demand. − Relevant to this aim, copolymerizations of small molecule natural products with carbon dioxide or other complementary feedstocks, some of which originate as waste from fossil fuel or human-made supplies, are of particular interest for the production of a broad range of types of sustainable polymeric materials. ,− For instance, the general class of ring-opening copolymerizations (ROCOPs) ,− ,− of cyclic ethers with comonomers, such as carbon dioxide (CO 2 ), ,− carbonyl sulfide (COS), , carbon disulfide (CS 2 ), , aryl isocyanates, , and cyclic anhydrides, ,,,,− has provided access to diverse backbone compositions, including polycarbonates, poly(monothiocarbonate)s, poly(thiocarbonate)s, polyurethanes or polyallophanates, and polyesters, respectively. However, a common limitation to this copolymerization strategy is the use of cyclic ethers from non-renewable sources, which adversely affects overall sustainability.…”