반응 #1747834

반응 방정식

N-methylpyrrolidine

chloromethyl methyl ether

→

N-methoxymethyl-N-methylpyrrolidinium chloride

용매

methyl acetate

반응 조건

후처리

1. 1
   온도the temperature was slowly raised
2. 2
   workup.STIRRINGthe mixture was stirred at room temperature for 10 hours
3. 3
   기타the reaction
4. 4
   여과The reaction mixture was filtered
5. 5
   세척the solid product was washed with 150 g of methyl acetate and 150 g of acetone
6. 6
   기타The washed product was dried in a vacuum

실험 절차

A 30.0 g quantity of N-methylpyrrolidine (reagent, product of Tokyo Kasei Co., Ltd.) was dissolved in 120 g of methyl acetate, followed by replacement with nitrogen. A 31.2 g quantity of chloromethyl methyl ether (reagent, product of Tokyo Kasei Co., Ltd.) was added dropwise to the solution at 5° C. over a period of 1 hour. The mixture was stirred at 5° C. for 1 hour, the temperature was slowly raised, and the mixture was stirred at room temperature for 10 hours to complete the reaction. The reaction mixture was filtered, and the solid product was washed with 150 g of methyl acetate and 150 g of acetone. The washed product was dried in a vacuum, giving 53.7 g of N-methoxymethyl-N-methylpyrrolidinium chloride. To the chloride salt (53.7 g) obtained was added 71.2 g of 42% aqueous solution of HBF4 to dissolve the salt. Nitrogen was bubbled through the solution at 130° C. to remove water, hydrogen chloride and excessive HBF4. To the solution was added 70 ml of methanol, and nitrogen was bubbled through the mixture at 130° C. to further remove water, hydrogen chloride and excessive HBF4 and obtain 68.2 g of the desired electrolyte, i.e., N-methoxymethyl-N-methylpyrrolidinium tetrafluoroborate (water: 30 ppm, methylpyrrolidine tetrafluoroborate: 4000 ppm). To 68.2 g of the electrolyte were added 2.0 g of barium chloride and 70 ml of methanol within a glove box having an argon atmosphere with a dew point of −60° C. Nitrogen was bubbled through the mixture at 130° C. to remove the methanol, followed by filtration with a membrane filter and analysis.

출처