反应详情

2.35 g (15.9 mmol) 5-hydroxy-1,2,3,4-tetrahydroisoquinoline, 1.92 mL (19.0 mmol) methyltrifluoroacetate and 15 mL DMF were mixed and stirred for over night at room temperature. The reaction mixture was diluted with dichloromethane, washed with water containing one drop of dil. hydrochloric acid and with aqueous sodium chloride. After drying over Na2SO4 and evaporation to dryness, the product was purified by silicagel chromatography (system C). Yield quantitative. 1H NMR (CDCl3, 400 MHz): 8.15 (1H, bd), 7.06 (1H, t, 8.1 Hz), 6.6-6.9 (2H, m), 4.75 (2H, ss), 3.86 (2H, m), 2.90 (2H, m).

1. washwashed with water containing one drop of dil. hydrochloric acid and with aqueous sodium chloride
2. dry with materialAfter drying over Na2SO4 and evaporation to dryness
3. customthe product was purified by silicagel chromatography (system C)
4. customYield quantitative