反应详情

To a solution of 1-(acetamidomethyl)-4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-6,7-dimethoxyisoquinolin-3-yl acetate 56 (20 mg, 38 μmol) in CH2Cl2 (9 mL) in a 25 mL round-bottomed flask equipped with a magnetic stirrer was added a 7 N NH3 solution in MeOH (1 mL) and the reaction mixture was stirred overnight at RT then diluted with CH2Cl2:MeOH=9:1 (50 mL) and the organic solution was washed with brine (10 mL), dried over Na2SO4, filtered and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 90:10) gave N-((4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-3-hydroxy-6,7-dimethoxyisoquinolin-1-yl)methyl)acetamide. The free base was dissolved in MeOH (3 mL) in a 10 mL round-bottomed flask equipped with a magnetic stirrer before addition of a 0.4 M HCl solution in MeOH (1 mL). The reaction mixture was stirred for 5 min at RT and concentrated at 40° C. under vacuum to afford N-((4-((2-(ethylamino)-6-methoxyquinolin-3-yl)methyl)-3-hydroxy-6,7-dimethoxyisoquinolin-1-yl)methyl)acetamide dihydrochloride 57 as a pale yellow solid (17 mg, 79% yield).

1. washMeOH=9:1 (50 mL) and the organic solution was washed with brine (10 mL)
2. dry with materialdried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated at 40° C. under vacuum
5. customPurification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 90:10)