反应详情

温度

0 °C

To a solution of 1,1′-sulfonyldiimidazole (3.50 g, 17.7 mmol) in DCM (75 mL) at about 0° C. was added methyl trifluoromethanesulfonate (1.94 mL, 17.7 mmol). The reaction mixture was stirred at about 0° C. for about 1 h, then warmed to ambient temperature and stirred for about 5 h. The solid was collected by vacuum filtration and washed with DCM (10 mL) to give 1-(1H-imidazol-1-ylsulfonyl)-3-methyl-1H-imidazol-3-ium trifluoromethanesulfonate (6.35 g, 98%) as a white solid: LC/MS (Table 1, Method a) Rt=0.082 min; MS m/z 213 (M+H)+.

1. temperaturewarmed to ambient temperature
2. stirringstirred for about 5 h
3. filtrationThe solid was collected by vacuum filtration
4. washwashed with DCM (10 mL)