反应详情

温度

20 °C

1-Acetyl-4-hydroxymethylpiperidine may be obtained in the following manner: acetic anhydride (20.5 cc) is added in the course of 15 minutes to a solution of hydroxymethylpiperidine (23.8 g) in ethanol (100 cc) at a temperature in the region of 10° C., and the mixture is stirred for 18 hours at a temperature in the region of 20° C. The reaction mixture is concentrated to dryness under reduced pressure (2.7 kPa); the residue obtained is taken up with water (50 cc) and potassium carbonate (50 g), and the solution is extracted with methylene chloride (3×150 cc); the organic extracts are combined, dried and concentrated to dryness under reduced pressure (2.7 kPa). 1-Acetyl-4-hydroxymethylpiperidine (33.6 g) is thereby obtained in the form of an oil, which is employed in the crude state in the subsequent syntheses.

1. concentrationThe reaction mixture is concentrated to dryness under reduced pressure (2.7 kPa)
2. customthe residue obtained
3. extractionthe solution is extracted with methylene chloride (3×150 cc)
4. customdried
5. concentrationconcentrated to dryness under reduced pressure (2.7 kPa)