[S:1]=[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH2:5][C:4](=[O:12])[NH:3]1.C([O-])([O-])=O.[K+].[K+].Br[CH2:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[Cl:27].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CCO>[Cl:27][C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=1[CH2:20][S:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[CH:5]=[C:4]([OH:12])[N:3]=1
To a 50 mL round bottom flask was added 1-thioxo-1,4-dihydro-2H-isoquinolin-3-one (0.8 g, 4.51 mmol), K2CO3 (1.9 g, 13.5 mmol), and absolute EtOH (15 mL) followed by 1-(bromomethyl)-2-chlorobenzene (0.88 g, 4.29 mmol). Upon completion of addition, the reaction mixture was stirred for 18 h. At the conclusion of this period, the reaction mixture was acidified with a solution of citric acid (100 mL, 10% w/v), extracted with EtOAc (100 mL), washed with brine (75 mL) and then dried over Na2SO4. The solvent was removed under vacuum to yield a residue. The residue was purified via silica gel chromatography (20% EtOAc:Hex) to yield the title compound as a pale yellow solid (1.1 g, 3.64 mmol, 81%). 1H NMR (400 MHz, DMSO-d6): δ ppm 8.05 (d, J=8.35 Hz, 1H), 7.59-7.64 (m, 1H), 7.50-7.57 (m, 2H), 7.37-7.42 (m, 1H), 7.31 (ddd, J=8.46, 6.92, 1.32 Hz, 1H), 7.16-7.23 (m, 2H), 6.71 (s, 1H), 5.92 (br. s., 1H), 4.67 (s, 2H). LC/MS m/z 302 [M+H].
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