反应详情

N-Acetyl-4-(2-phenylallyloxy)piperidine (4.0 g.) in dry tetrahydrofuran (60 ml.) was added dropwise to a stirred solution of mercuric acetate (6.35 g.) in water (60 ml.) and the solution stirred at room temperature for one hour. Sodium hydroxide solution (40 ml., 3 N) and sodium borohydride (0.75 g.) in sodium hydroxide solution (40 ml., 3 N) were then added dropwise to the stirred solution at 0° C. The grey suspension was stirred at 0° C. for one hour, glacial acetic acid was added to pH 6, then the suspension filtered and the filtrate extracted with chloroform (3×150 ml.). The combined chloroform extracts were dried (Na2SO4) and evaporated in vacuo to give N-acetyl-4-(2-hydroxy-2-phenyl-n-propoxy)piperidine (2.1 g.). This product in methanol (30 ml.) and sodium hydroxide solution (20 ml., 5 N) was heated under reflux for 4 hours. The organic solvent was evaporated and the aqueous solution extracted with chloroform (3×20 ml.), dried (Na2SO4) and the solvent evaporated in vacuo to give 4-(2-hydroxy-2-phenyl-n-propoxy)piperidine (1.8 g.) as an oil. A sample was characterized as the oxalate salt which recrystallized from ethyl acetate and had an m.p. of 132°-134° C.

1. stirringThe grey suspension was stirred at 0° C. for one hour
2. filtrationthe suspension filtered
3. extractionthe filtrate extracted with chloroform (3×150 ml.)
4. dry with materialThe combined chloroform extracts were dried (Na2SO4)
5. customevaporated in vacuo