was washed three times with diethyl ether (3x100 mL) and then dried under vacuum. Yield 16.70 g (98%). 1H NMR (400 MHz, CD3CN): 8.95 (s, 1H, 2-H), 7.52-7.30 (m, 10H, Ph), 3.71 (s, 6H, 1+3-CH3). 13C NMR (101 MHz, CD3CN): 137.34 (2-C), 133.58, 132.23, 131.56, 130.27, 126.69, 35.84 (1+3-C). 1,3-Dimethyl-4,5-diphenylimidazolium bis(trifluoromethane)sulfonamide. A conical flask equipped with a stirring bar was charged with 4,5-diphenyl-1,3-dimethylimidazolium iodide (11.90 g, 31.63 mmol). Milli-Q water (20 mL) was added, followed by LiNTf2 (10.0 g, 34.83 mmol, 1.1 eq.) and CH3CN (20 mL). After stirring for 24 h, CH3CN was removed by a slow flow of N2, CH2Cl2 (20 mL) was added to dissolve the imidazolium NTf2 salt and the layers were transferred to a separation funnel. Some Milli-Q water (20 mL) was added and the aqueous layer was extracted four times with CH2Cl2 (4x100 mL). The combined organic layers were washed with Milli-Q water (20 mL) to remove last traces of LiNTf2 and dried on Na2SO4. After evaporation of CH2Cl2 and further drying under vacuum, the product was obtained as a white solid. Yield 16.58 g (99%). 1H NMR (400 MHz, CD3CN): 8.55 (s, 1H, 2-H), 7.53-7.30 (m, 10H, Ph), 3.68 (s, 6H, 1+3-CH3). 13C NMR (101 MHz, CD3CN): 137.09 (2-C), 133.80, 132.12, 131.65, 130.34, 126.62, 126.12 (NTf2), 122.93 (NTf2), 119.74 (NTf2), 116.55 (NTf2), 35.57 (1+3-C). 19F NMR (376 MHz, CD3CN): −80.19. 1,3-Dimethyl-4,5-bis(4-methoxyphenyl)imidazolium iodide. 4,5-Bis(4methoxyphenyl)imidazole (3.31 g, 11.81 mmol) was dissolved in a mixture of CH3CN (100 mL) and tetrahydrofuran (10 mL) in a 500 mL round bottom flask equipped with a reflux condenser. Sodium hydrogen carbonate (1.488 g, 17.7 mmol) and excess iodomethane (10 mL, 0.16 mol) were added and the mixture was stirred at 40 °C under N2 for 7 days. Iodomethane and CH3CN were removed using a rotary evaporator. To the solid residue, CH2Cl2 (100 mL)
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