反应详情

Add 2,4-dimethoxybenzylamine (27.64 g, 165.3 mmol) to a solution of indole-7-carboxaldehyde (20.0 g, 137.7 mmol) and acetic acid (8.26 ml, 137.7 mmol) in toluene (250 ml). Reflux and collect water using a Dean-Stark trap while replacing with fresh anhydrous toluene. Concentrate under reduced pressure, dissolve the residue in methanol and add sodium borohydride in portions. Dilute with ethyl acetate and wash sequentially with saturated aqueous sodium bicarbonate followed by saturated aqueous sodium chloride, dry over magnesium sulfate, and concentrate under reduced pressure to provide the desired compound as a brown oil.

1. temperatureReflux
2. customcollect water using a Dean-Stark trap
3. concentrationConcentrate under reduced pressure
4. dissolutiondissolve the residue in methanol
5. additionadd sodium borohydride in portions
6. additionDilute with ethyl acetate
7. washwash sequentially with saturated aqueous sodium bicarbonate
8. dry with materialdry over magnesium sulfate
9. concentrationconcentrate under reduced pressure