[CH3:1][N:2]1[CH2:6][CH2:5][N:4]([CH3:7])[C:3]1(Cl)[Cl:8].[CH3:10][O:11][S:12]([O-:15])(=[O:14])=[O:13].[Na+]>C(#N)C>[CH3:10][O:11][S:12]([O-:15])(=[O:14])=[O:13].[CH3:1][NH+:2]1[CH2:6][CH2:5][N:4]([CH3:7])[CH:3]1[Cl:8]3.00 g (17.75 mmol) of 1,3-dimethyl-2,2-dichloroimidazolidine and 2.38 g (17.75 mmol) of sodium methylsulfate are mixed with 20 ml of dry acetonitrile. The reaction mixture is stirred for 5 hours at room temperature, and the precipitate NaCl is filtered off. The solvent is distilled off, and the residue is dried for 1 hour under a reduced pressure of 7 Pa and at 50° C., giving 4.09 g of 1,3-dimethyl-2-chloroimidazolidinium methylsulfate as a viscous material, corresponding to a yield of 94.2%.
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