反应详情

25 g (0.2 mole) of dimethyl sulfate are added to 500 ml of 50% strength sodium hydroxide solution at 5°-10° C., and 158 g (1.25 moles) of dimethyl sulfate and 117 g (1.0 mole) of N-α-methoxyethyl-acetamide are simultaneously added dropwise in the course of 3 hours, while stirring. After a further 3 hours, 50 ml of concentrated ammonia are added, and after 30 minutes, the phases are separated in a separating funnel and the aqueous layer is extracted with diethyl ether. After stripping off the solvent, distillation of the residue in vacuo gives 120 g (92% of theory) of N-α-methoxyethyl-N-methyl-acetamide of boiling point18 76°-81° C.

1. waitafter 30 minutes
2. customthe phases are separated in a separating funnel
3. extractionthe aqueous layer is extracted with diethyl ether
4. distillationthe solvent, distillation of the residue in vacuo