反应详情

2.0 g of 2,4,6,7-tetramethyl-5-nitrodihydrobenzofuran-2-aldehyde, 1.52 g of 2,3,4,9-tetrahydro-1H-beta-carboline, 50 ml of methylene chloride, 0.8 ml of acetic acid and 2.04 g of sodium triacetoxyborohydride were added, followed by stirring overnight at room temperature. The mixture was poured into ice-water and an aqueous sodium hydroxide solution was added. The reaction solution was extracted with chloroform, washed with saturated saline and dried over anhydrous magnesium sulfate and, after the solvent was distilled off under reduced pressure, the residue was purified by silica gel column chromatography (chloroform:ethyl acetate=50:1) to obtain 1.49 g of the objective product.

1. extractionThe reaction solution was extracted with chloroform
2. washwashed with saturated saline
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationafter the solvent was distilled off under reduced pressure
5. customthe residue was purified by silica gel column chromatography (chloroform:ethyl acetate=50:1)