2025-08-29 東京大学
産業活動で生じるCO₂と植物が排出するイソプレンから得られるCOOIL
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2025-08-29-001
- https://www.t.u-tokyo.ac.jp/hubfs/press-release/2025/0829/001/text.pdf
- https://www.nature.com/articles/s41467-025-62409-2
100%再生可能材料に向けたイソプレンとCO2のグラムスケール選択的テロメラーゼ反応 Gram-scale selective telomerization of isoprene and CO2 toward 100% renewable materials
Marius D. R. Lutz,Felix Kracht,Kota Marumoto & Kyoko Nozaki
Nature Communications Published:28 August 2025
DOI:https://doi.org/10.1038/s41467-025-62409-2
Abstract
Carbon dioxide (CO2) is an ideal chemical feedstock due to its abundance, low cost, low toxicity and its role as a greenhouse gas. Telomerization with butadiene give rise to functional small molecules and polymers with significant CO2 content, but the fossil origin of the olefin offsets sustainability benefits. Here, we present a palladium-catalyzed telomerization of CO2 with isoprene, two of the most prevalent organic compounds in the atmosphere, yielding “COOIL”, an ideally 100% renewable δ-lactone containing 24 wt% CO2, with high selectivity and turnover numbers above 100. A combination of a Pd catalyst, acetate, and controlled water promoted selectivity and conversion. Density functional theory calculations reveal reductive elimination as the rate-limiting and selectivity-determining step, preceded by isoprene dimerization. The head-tail pathway is the kinetic pathway while the tail-tail product is the thermodynamic product. This functionalized lactone also shows promise for polymerization under Lewis acid-promoted conditions, opening avenues for sustainable polymers from CO2 and bio-derived feedstocks.
