反应详情

N-Benzyl-N-methyl-ethanolamine (20.73 g), 61.94 g of toluene and 83.41 g of a 30% aqueous solution of NaOH were respectively weighed and placed in a 300-mL four-necked flask. While the mixture was stirred, the flask inside temperature was lowered to 6.8° C. Then, 31.68 g of methanesulfonyl chloride was added dropwise over 3 hours and 17 minutes at a flask inside temperature of 5 to 10° C. Water (33 mL) was added to dissolve the NaCl which had precipitated out in the aqueous phase, and the mixture was separated into the toluene phase and aqueous phase. A toluene solution of N-benzyl-N-methyl-ethanolamine methanesulfonate was thus obtained in a yield of 68.8 mole percent.

1. customplaced in a 300-mL four-necked flask
2. customwas lowered to 6.8° C
3. customhad precipitated out in the aqueous phase
4. customthe mixture was separated into the toluene phase and aqueous phase