反应详情

温度

150 °C

To a stirred solution of 3-(chloromethyl)-N-ethyl-6-methoxyquinolin-2-amine hydrochloride (250 mg, 0.87 mmol) in THF (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added 1-isopropyl-6,7-dimethoxyisoquinolin-3-ol SIL 32164 (215 mg, 0.87 mmol) followed by a 2 N aq. LiOH solution (0.87 mL, 1.74 mmol) and the mixture was stirred at 150° C. for 1.5 h under microwave irradiation. After cooling to RT, the mixture was diluted with CH2Cl2:MeOH=9:1 (150 mL), washed with brine (20 mL), dried over Na2SO4, filtered, and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 0:100) followed by a second purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 95:5) provided, after evaporation and drying, 38 mg of 4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-1-isopropyl-6,7-dimethoxyisoquinolin-3-ol as a brown solid. This free base was dissolved in CH2Cl2 (2 mL) in a 10 mL round-bottomed flask equipped with a magnetic stirrer before addition of a 0.49 M HCl solution in MeOH (0.70 mL). The reaction mixture was stirred for 5 min at RT then concentrated at 40° C. under vacuum to afford 4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-1-isopropyl-6,7-dimethoxyisoquinolin-3-ol dihydrochloride 47 as a yellow solid (24 mg, 5% yield).

1. temperatureAfter cooling to RT
2. washMeOH=9:1 (150 mL), washed with brine (20 mL)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated at 40° C. under vacuum
6. customPurification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 0:100)
7. customfollowed by a second purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 95:5)
8. customprovided
9. customafter evaporation
10. customdrying
11. dissolutionThis free base was dissolved in CH2Cl2 (2 mL) in a 10 mL round-bottomed flask
12. customequipped with a magnetic stirrer before addition of a 0.49 M HCl solution in MeOH (0.70 mL)
13. stirringThe reaction mixture was stirred for 5 min at RT
14. concentrationthen concentrated at 40° C. under vacuum