反应详情

To a solution of 1-[1-(3,4-dichlorobenzyl)piperidin-4-yl]-3-methyl-2-butanone (0.16 g, 0.49 mmol) in methanol (1.5 ml) was added ammonium acetate (0.38 g, 4.93 mmol), followed by sodium cyanoborohydride (31 mg, 0.5 mmol) and the resulting solution was stirred at room temperature. After 48 h, hydrochloric acid (conc.) was added until pH was 2 and the volatiles were removed under vacuum. The residue was dissolved in water and washed with ethyl acetate. The aqueous layer was then basified to pH>10 and extracted with ethyl acetate. The ethyl acetate layer was washed with brine, dried over sodium sulfate and concentrated to give 1(RS)-[1-(3,4-dichlorobenzyl)piperidin-4-ylmethyl]-2-methylpropylamine (0.16 g) as an oil which was used in the next step without further purification.

1. customthe volatiles were removed under vacuum
2. dissolutionThe residue was dissolved in water
3. washwashed with ethyl acetate
4. extractionextracted with ethyl acetate
5. washThe ethyl acetate layer was washed with brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated