Gram-scale selective telomerization of isoprene and CO2 toward 100% renewable materials

Marius D. R. Lutz, Felix Kracht, Kota Marumoto and Kyoko Nozaki ()
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Marius D. R. Lutz: The University of Tokyo
Felix Kracht: The University of Tokyo
Kota Marumoto: The University of Tokyo
Kyoko Nozaki: The University of Tokyo

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: 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.

Date: 2025
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DOI: 10.1038/s41467-025-62409-2

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