Easily available and inexpensive FeIIIcarbamates were employed in the solvent-free synthesis of a series of cyclic carbonates from epoxides and CO2at room temperature and atmospheric pressure, in the presence of a cocatalyst. Different experimental conditions (type and concentration of catalyst and cocatalyst, as well as reaction time) were investigated: Fe(O2CNEt2)3and NBu4Br acted as the best catalyst/cocatalyst combination, allowing the formation of propylene carbonate and 1,2-butylene carbonate with quantitative yield and selectivity in 24 h. According to NMR and DFT studies, the reaction proceeds with the dynamic trapping of carbon dioxide as a carbamato ligand.
Iron(III) N,N-Dialkylcarbamate-Catalyzed Formation of Cyclic Carbonates from CO2 and Epoxides under Ambient Conditions by Dynamic CO2 Trapping as Carbamato Ligands
Bresciani, Giulio;Marchetti, Fabio
;Pampaloni, Guido
2018-01-01
Abstract
Easily available and inexpensive FeIIIcarbamates were employed in the solvent-free synthesis of a series of cyclic carbonates from epoxides and CO2at room temperature and atmospheric pressure, in the presence of a cocatalyst. Different experimental conditions (type and concentration of catalyst and cocatalyst, as well as reaction time) were investigated: Fe(O2CNEt2)3and NBu4Br acted as the best catalyst/cocatalyst combination, allowing the formation of propylene carbonate and 1,2-butylene carbonate with quantitative yield and selectivity in 24 h. According to NMR and DFT studies, the reaction proceeds with the dynamic trapping of carbon dioxide as a carbamato ligand.File | Dimensione | Formato | |
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