Bis(2-bromoethyl) ether → Methyl 2-(tert-butoxy)-2-(4-(3,4-dimethylphenyl)-2-methyl-7-(morpholinomethyl)-1-oxo-1,2-dihydroisoquinolin-3-yl)acetate

Participants

Reaction Conditions

Reaction Steps

A solution of methyl 2-(7-(aminomethyl)-4-(3,4-dimethylphenyl)-2-methyl-1-oxo-1,2-dihydroisoquinolin-3-yl)-2-(tert-butoxy)acetate (17 mg, 0.039 mmol) in toluene (750 μl) was treated with DIEA (13.60 μl, 0.078 mmol) and 1-bromo-2-(2-bromoethoxy)ethane (5.87 μl, 0.047 mmol). The mixture was stirred at 90° C. for 6 hours. Additional DIEA (13.60 μl, 0.078 mmol) and 1-bromo-2-(2-bromoethoxy)ethane (5.87 μl, 0.047 mmol) were added, the reaction was stirred at 90° C. overnight. The reaction was cooled to rt, diluted with EtOAc, washed with water, brine, dried with Na2SO4, filtered, and concentrated. The residue was purified by column chromatography (0-10% MeOH/DCM) to afford methyl 2-(tert-butoxy)-2-(4-(3,4-dimethylphenyl)-2-methyl-7-(morpholinomethyl)-1-oxo-1,2-dihydroisoquinolin-3-yl)acetate (15.6 mg, 0.031 mmol, 79% yield). The methyl ester was hydrolyzed in a manner similar to that described in Example 165 Step C and purified by reverse phase HPLC to afford 2-(tert-butoxy)-2-(4-(3,4-dimethyl phenyl)-2-methyl-7-(methylsulfonamidomethyl)-1-oxo-1,2-dihydroisoquinolin-3-yl)acetic acid (14 mg, 0.027 mmol, 88% yield) as a white solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.42 (s, 1 H), 7.71-7.61 (m, 1 H), 7.24-7.33 (m, 1 H), 7.26-7.17 (m, 2 H), 7.07-6.96 (m, 1 H), 5.35 (s, 1 H), 4.40-4.22 (m, 2 H), 4.03-3.81 (m, 4 H), 3.71 (s, 3 H), 3.59-3.37 (m, 2 H), 2.92 (br. s., 2 H), 2.37 (s, 3 H), 2.32 (s, 1.5 H), 2.29 (s, 1.5 H). 1.06 (s, 4.5 H), 1.05 (s, 4.5 H); LCMS (m/z) ES+=493 (M+1).

Provenance & Evidence