反应详情

1-(1-(4-fluorobenzyl)-1H-indole-2-carbonyl)piperidine-4-carbaldehyde (91 mg, 0.250 mmol) was dissolved in THF (4 mL) and (R)-α-methylbenzylamine (0.048 mL, 0.375 mmol) was added. The solution was stirred at rt for 10 h, at which time the THF was removed in vacuo and the residue dissolved in EtOH (5 mL), and sodium cyanoborohydride (47 mg, 0.749 mmol) and a catalytic drop of glacial acetic acid were added. Stirring was permitted for 15 h, at which time the solvent was removed in vacuo, the residue was taken up in EtOAc. The organic phase was washed with 10% aq. sodium carbonate, dried over magnesium sulfate, and concentrated. Purification was accomplished via silica gel flash chromatography (30 g silica gel, 5:95 7M methanolic ammonia:ethyl acetate.) The title compound was obtained as a yellow oil. (Yield: 52 mg, 0.111 mmol, 44%) 1H NMR (400 MHz, CDCl3) 7.62, 7.39-7.22, 7.14, 7.07-6.99, 6.89-6.80, 6.57, 5.41, 4.56, 4.02, 3.76, 2.73, 2.36-2.18, 1.60, 1.39, 0.97, 0.52

1. customwas removed in vacuo
2. dissolutionthe residue dissolved in EtOH (5 mL)
3. customthe solvent was removed in vacuo
4. washThe organic phase was washed with 10% aq. sodium carbonate
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated
7. customPurification
8. customwas obtained as a yellow oil