反应详情

A mixture of 4[3-(1H-imidazol-1-yl)propyl]-1-piperidinecarboxaldehyde (2.12 g, 0.0095M) in dioxane (80 ml) and 2NHCl (11 ml) was refluxed for 51/2 hrs. After the reaction, the solvent was removed, water was added and the solution was basified with 2N NaOH to pH 10 and extracted with CH2Cl2 (3×50 ml). The extracts were concentrated to give an oil (1.55 g, 80%). The dihydrochloride salt of the 4[3-(1H-imidazol-1-yl)propyl]-piperidine which was crystallized from acetone has m.p. 184°-186° C.

1. temperaturewas refluxed for 51/2 hrs
2. customAfter the reaction
3. customthe solvent was removed
4. additionwater was added
5. extractionextracted with CH2Cl2 (3×50 ml)
6. concentrationThe extracts were concentrated