Journal
CHEMSUSCHEM
Volume 11, Issue 16, Pages 2737-2743Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201801065
Keywords
carbon dioxide; cyclic carbonates; epoxides; homogeneous catalysis; iron
Funding
- M.I.U.R. (Fondo di Finanziamento delle attivita base di ricerca, FFABR)
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Easily available and inexpensive Fe-III carbamates were employed in the solvent-free synthesis of a series of cyclic carbonates from epoxides and CO2 at 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)(3) and 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 24h. According to NMR and DFT studies, the reaction proceeds with the dynamic trapping of carbon dioxide as a carbamato ligand.
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