反应详情

Into dichloromethane (5 mL), 2-(trimethylsilyl)ethyl 4-{4-[4-(tert-butoxycarbonyl)piperazin-1-yl]phenyl}isoquinoline-6-carboxylate (103 mg, 0.193 mmol) synthesized in Example 16 (16a) was dissolved, to which trifluoroacetic acid (0.5 mL) was added, followed by stirring at room temperature for three hours. After concentration, the resulting mixture was diluted with dichloromethane (20 mL) and neutralized with a saturated aqueous solution of sodium bicarbonate (15 mL). The resulting organic layer was dried over sodium sulfate and filtered. The solvent was distilled off under reduced pressure. The residue thus obtained was dissolved in pyridine (5 mL), to which anhydrous acetic acid (0.5 mL) was added, followed by stirring at room temperature overnight. After concentration, the resulting mixture was diluted with dichloromethane (20 mL) and neutralized with a saturated aqueous solution of sodium bicarbonate (15 mL). The solution thus obtained was extracted with dichloromethane (20 mL), and the resulting organic layer was dried over sodium sulfate and filtered. The solvent was distilled off under reduced pressure and the resulting product was purified by thin layer chromatography (dichloromethane:methanol=97:3) to give the desired title compound (54 mg, yield 58%).

1. additionwas added
2. concentrationAfter concentration
3. additionthe resulting mixture was diluted with dichloromethane (20 mL)
4. dry with materialThe resulting organic layer was dried over sodium sulfate
5. filtrationfiltered
6. distillationThe solvent was distilled off under reduced pressure
7. customThe residue thus obtained
8. additionwas added
9. stirringby stirring at room temperature overnight
10. concentrationAfter concentration
11. additionthe resulting mixture was diluted with dichloromethane (20 mL)
12. customThe solution thus obtained
13. extractionwas extracted with dichloromethane (20 mL)
14. dry with materialthe resulting organic layer was dried over sodium sulfate
15. filtrationfiltered
16. distillationThe solvent was distilled off under reduced pressure
17. customthe resulting product was purified by thin layer chromatography (dichloromethane:methanol=97:3)