Sodium methyl sulfate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 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%. the precipitate NaCl is filtered off The solvent is distilled off the residue is dried for 1 hour under a reduced pressure of 7 Pa and at 50° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1.54 g (11.48 mmol) of sodium methylsulfate and 10 ml of dry acetonitrile are added under an inert-gas atmosphere to 1.96 g (11.46 mmol) of bis(dimethylamino)dichloromethane. The reaction mixture is stirred for 5 hours at room temperature, and the precipitate of NaCl is filtered off. The solvent of the filtrate is subsequently distilled off, and the residue obtained is dried for 1 hour at an oil-bath temperature of 50° C. under reduced pressure at 7.0 Pa, giving 2.78 g of bis(dimethylamino)chlorocarbenium methylsulfate as a viscous liquid, corresponding to a yield of 98.3%. the precipitate of NaCl is filtered off The solvent of the filtrate is subsequently distilled off the residue obtained is dried for 1 hour at an oil-bath temperature of 50° C. under reduced pressure at 7.0 Pa