Abstract
3-Bromo-1,1,1-trifluoro-2-propanol (3-BTFP) in combination with n-butylammonium iodide (TBAI) was proved to be an efficient organocatalyst for chemical fixation of CO2 with various epoxides to the respective cyclic carbonates. A possible reaction mechanism was proposed wherein 3-BTFP activated epoxide through hydrogen bonding interaction. This mechanism is revealed by the results of FT-IR spectra and 1H NMR titration, and the synergetic effect functioned by 3-BTFP and TBAI ensures the reaction proceeding effectively. Herein, 3-BTFP represents a commercially available, stable and metal-free hydrogen-bonding donor for CO2 transformation, which has a potential application for the large-scale synthesis of cyclic carbonates.
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