反应详情

To a solution of 1-piperidinepropylamine (3.00 g, 21.1 mmol) in MeOH (60 mL) were added dimethoxyacetaldehyde (45% solution in TBME, 6.5 mL, 25 mmol) magnesium sulfate (22.8 g, 190 mmol), AcOH (5.07 g, 84.4 mmol), and sodium cyanoborohydride (1.99 g, 31.6 mmol) at 0° C. The ice bath was removed, then after 18 h the reaction mixture was partitioned between sat. aq. sodium hyrogencarbonate solution and EtOAc. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (SiO2; CH2Cl2/MeOH/25% aq. ammonia solution 90:10:0.25) afforded the title compound (2.08 mg, 43%). Colorless liquid, 231.2 (M+H)+.

1. customThe ice bath was removed
2. customafter 18 h the reaction mixture was partitioned between sat. aq. sodium hyrogencarbonate solution and EtOAc
3. washThe organic layer was washed with brine
4. dry with materialdried (MgSO4)
5. customevaporated