反应详情

A mixture of 170.1 g (1.0 mole) of 2-(chloromethyl)piperidine hydrochloride (M. Rink and H. G. Liem, Arch. Pharm. 292, 165-169 (1959)), 506 g (5.0 mole) of dipropylamine and 1.7 1 of dichloromethane were boiled under reflux for 3 hours, then evaporated in vacuo, and the residue was made alkaline with potassium hydroxide solution with external ice cooling. Exhaustive extraction with t-butyl methyl ether was carried out, and the combined extracts were washed twice with 100 ml of water each time, dried over sodium sulphate, and the solvent was removed by distillation in vacuo. The residue was fractionally distilled under water pump vacuum. Colourless oil of boiling point 108-114° C. (12 mm Hg ). Yield: 108.6 g (55% of theory).

1. temperatureunder reflux for 3 hours
2. customevaporated in vacuo
3. extractionExhaustive extraction with t-butyl methyl ether
4. washthe combined extracts were washed twice with 100 ml of water each time
5. dry with materialdried over sodium sulphate
6. customthe solvent was removed by distillation in vacuo
7. distillationThe residue was fractionally distilled under water