[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([CH:12]([C:14]1[C:23]3[C:18](=[CH:19][C:20]([O:26][CH3:27])=[C:21]([O:24][CH3:25])[CH:22]=3)[N:17]=[CH:16][CH:15]=1)O)[CH:6]=[CH:5]2>C(O)=O.[Zn]>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([CH2:12][C:14]1[C:23]3[C:18](=[CH:19][C:20]([O:26][CH3:27])=[C:21]([O:24][CH3:25])[CH:22]=3)[N:17]=[CH:16][CH:15]=1)[CH:6]=[CH:5]2To a solution of (6-bromo-naphthalen-2-yl)-(6,7-dimethoxy-quinolin-4-yl)-methanol (Step e, 0.55 g, 1.3 mmol) in formic acid (10 mL), was added Zn dust (500 mg, 7.6 mmol). The suspension was heated at reflux for 6 h and the solvent was removed in vacuo. The resulting residue was worked up with 1N NaOH and extracted with CH2Cl2 3×. The combined organic layer was washed with water and brine, dried over Na2SO4, filtered and concentrated in vacuo. The crude was purified with silica gel column chromatography (40-65% EtOAc/Hexane) to give the titled compound. MS (ESI, pos. ion) m/z: 408.1 (M+1).
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