Lithium Hydroxide → HCID 178440227, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of N-(2-((3-(chloromethyl)-6-methoxyquinolin-2-yl)amino)ethyl)acetamide hydrochloride SLA 41090 (128 mg, 0.372 mmol) in THF (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added 6,7-dimethoxy-1-propylisoquinolin-3-ol RBO 35134 (103 mg, 0.417 mmol) followed by a 2 N aq. LiOH solution (0.21 mL, 0.42 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) and washed with brine (20 mL), dried over Na2SO4, filtered and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent CH2Cl2:MeOH=100:0 to 92:8) provided 19.4 mg of N-(2-(3-((3-hydroxy-6,7-dimethoxy-1-propylisoquinolin-4-yl)methyl)-6-methoxyquinolin-2-ylamino)ethyl)acetamide. 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 (1.0 mL). The reaction mixture was stirred for 5 min at RT then concentrated at 40° C. under vacuum to afforded N-(2-((3-((3-hydroxy-6,7-dimethoxy-1-propylisoquinolin-4-yl)methyl)-6-methoxyquinolin-2-yl)amino)ethyl)acetamide dihydrochloride 55 as a yellow solid (20 mg, 9% yield).

Provenance & Evidence