Titre : “Development of New Catalytic Reactions toward Utilization of Renewable Resources''
Endroit : Pavillon Roger-Gaudry, salle G-715 à 11 h (Exceptionnellement JEUDI)
Hôte : Professeur André Charette
Cette conférence sera prononcée (en anglais) par la Professeure Kyoko Nozaki de l'université de Tokyo.
Résumé :Carbon dioxide is one of the most attractive renewable C1 resources, which has many practical advantages such as abundance, economic efficiency, and lack of toxicity. The favorable nature as a carbon source is, however, inextricably linked to its inherent inertness. Here we report a new strategy to circumvent thermodynamic and kinetic barriers for copolymerizations of carbon dioxide and olefins by using a meta-stable lactone intermediate, 3-ethylidene-6-vinyltetrahydro-2H-pyran-2-one, which is formed by the palladium-catalyzed condensation of carbon dioxide and 1,3-butadiene. Subsequent free radical polymerization of the lactone intermediate afforded high-molecular-weight polymers with a carbon dioxide content of 33 mol% (29 wt%). 1
Our latest results in direct and selective hydrogenolysis of sp2 C–OH bonds in arenols and O–CH3 bonds in aryl methyl ethers by hydroxycyclopentadienyl dihydridoiridium catalysts will be also presented, implying their potential application for mass production of arenes from lignin or its degraded components.2
1. Nakano, R.; Ito, S.; Nozaki, K. Nature Chem. 2014, 6, 325-331
2. Kusumoto,S.; Nozaki, K. Nature Commun. 2015, 6, 6296.
