反应详情

To a suspension of 1-oxo-7-(propan-2-yloxy)-1,2,3,4-tetrahydroisoquinoline-5-carboxylic acid (77a, 1.76 g, 7.06 mmol) in anhydrous dioxane (100 mL) was added CDI (1.43 g, 8.83 mmol). The resulting mixture was stirred at room temperature for 30 minutes, then stirred at 100° C. for 30 minutes. After cooling down to room temperature, TMSA (1.50 mL, 10.8 mmol) was added. After stirring the reaction mixture for 2 hours, t-butanol (25.0 mL) was added. The resulting mixture was stirred at 100° C. overnight. After cooling to room temperature and concentrating under vacuum, the resulting residue was purified by column chromatography (0-100% EtOAc/heptanes) to give tert-butyl [1-oxo-7-(propan-2-yloxy)-1,2,3,4-tetrahydroisoquinolin-5-yl]carbamate (77b, 958 mg, 42%) as a solid.

1. stirringstirred at 100° C. for 30 minutes
2. temperatureAfter cooling down to room temperature
3. additionTMSA (1.50 mL, 10.8 mmol) was added
4. stirringAfter stirring the reaction mixture for 2 hours
5. stirringThe resulting mixture was stirred at 100° C. overnight
6. temperatureAfter cooling to room temperature
7. concentrationconcentrating under vacuum
8. customthe resulting residue was purified by column chromatography (0-100% EtOAc/heptanes)