反应详情

Phthalic anhydride (200 mg, 1.34 mmol, 2.53 eq) is added at room temperature to a stirred solution of trans-4-(6-methoxy-3,4-dihydro-2H-1-oxa-4,5,9-triaza-phenanthren-3-yl)-cyclohexylamine (200 mg, 0.53 mmol, 1.0 eq) in pyridine (4 mL). The reaction mixture is heated to reflux for 3 hours, pyridine is then removed and acetic anhydride (1 mL) is added. The resulting mixture is heated to reflux for 2 hours, then extracted with ethyl acetate (3×10 mL) and water (5 mL). The combined organic layers are dried over sodium sulfate, filtered and concentrated to afford 2-[trans-4-(6-methoxy-3,4-dihydro-2H-1-oxa-4,5,9-triaza-phenanthren-3-yl)-cyclohexyl]-isoindole-1,3-dione as a light brown semisolid (190 mg, 69% yield).

1. temperatureThe reaction mixture is heated
2. temperatureto reflux for 3 hours
3. custompyridine is then removed
4. additionacetic anhydride (1 mL) is added
5. temperatureThe resulting mixture is heated
6. temperatureto reflux for 2 hours
7. extractionextracted with ethyl acetate (3×10 mL) and water (5 mL)
8. dry with materialThe combined organic layers are dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated