反应详情

The compound (50.6 mg) obtained in Example 3-2 was dissolved in anhydrous methanol (2.0 ml) and added with 3-methylpyridine-2-carboxaldehyde (24.2 mg) and trimethyl orthoformate (0.0430 ml), followed by stirring at room temperature for 30 minutes. Then, the solution was added with sodium borohydride (14.8 mg), followed by stirring at room temperature for 15 minutes. After completion of the reaction, the solvent was distilled off. The residue was dissolved in chloroform and washed with a 1 mol/l sodium hydroxide aqueous solution and saturated saline solution, followed by drying with anhydrous magnesium sulfate. The solvent was distilled off and the residue was then treated with hydrochloric acid. Subsequently, the residue was purified through silica gel column chromatography (chloroform/methanol/water), thereby obtaining hydrochloride (59.3 mg) of the subject compound as a white solid.

1. stirringby stirring at room temperature for 15 minutes
2. customAfter completion of the reaction
3. distillationthe solvent was distilled off
4. dissolutionThe residue was dissolved in chloroform
5. washwashed with a 1 mol/l sodium hydroxide aqueous solution and saturated saline solution
6. dry with materialby drying with anhydrous magnesium sulfate
7. distillationThe solvent was distilled off
8. additionthe residue was then treated with hydrochloric acid
9. customSubsequently, the residue was purified through silica gel column chromatography (chloroform/methanol/water)