反应详情

147 mg (1.45 mmol) of triethylamine and 277 mg (1.21 mmol) of benzyl bromoacetate were added successively to a solution of 300 mg (1.21 mmol) of 1-phenyl-1,2,3,4-tetrahydro-β-carboline, as obtained in Example 70, in 10 ml of methylene chloride, with ice-cooling, and the resulting mixture was stirred at room temperature for 3 hours. After this time, 277 mg of benzyl bromoacetate and 183 mg of triethylamine were added to the reaction mixture, and the resulting mixture was allowed to stand for 2 days. At the end of this time, first a saturated aqueous solution of sodium hydrogencarbonate and then water were added successively to the reaction mixture, which was then extracted with ethyl acetate. The resulting extract was washed with a saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate, and the ethyl acetate was removed by evaporation under reduced pressure to give 0.61 g of a crude mixture. The resulting residue was subjected to column chromatography using 13 g of silica gel with a 9:1 by volume mixture of hexane and ethyl acetate as the eluent, to yield 0.49 g of the title compound as yellow crystals in quantitative yield. The product was subsequently recrystallized from ethyl acetate to yield 0.37 g of the title compound as yellow crystals, melting at 130.8°-132.0° C.

1. temperaturecooling
2. waitto stand for 2 days
3. extractionwas then extracted with ethyl acetate
4. extractionThe resulting extract
5. washwas washed with a saturated aqueous solution of sodium chloride
6. dry with materialdried over anhydrous sodium sulfate
7. customthe ethyl acetate was removed by evaporation under reduced pressure
8. customto give 0.61 g of a crude mixture