[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[C:7]1[N:12]=[C:11]([OH:13])[C:10]([C:14]#[C:15][Si](C)(C)C)=[CH:9][N:8]=1.Cl[CH2:21][C:22]1[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=1.C(N(CC)CC)C.O>CN(C=O)C>[C:14]([C:10]1[C:11]([O:13][CH2:21][C:22]2[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=2)=[N:12][C:7]([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=2)=[N:8][CH:9]=1)#[CH:15]A mixture of compound 37-i (1.0 g, 3.7 mmol), 1-(chloromethyl)-4-methoxybenzene (0.7 g, 4.4 mmol), and triethylamine (1.5 g, 11.1 mmol) in DMF (10 mL) was stirred overnight at 80° C. The reaction mixture was cooled to room temperature, poured into water, and extracted with ethyl acetate. The combined organic layer was dried over sodium sulfate and concentrated. The residue was purified by flash chromatography (PE:EA=1:3) to afford compound 37-j (300 mg, 25%) as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 8.988-8.980 (s, 1H)), 8.775 (s, 1H), 8.581-8.555 (m, 1H), 8.020 (m, 1H), 7.554-7.541 (m, 1H), 7.522-7.493 (d, J=8.7 Hz, 2H), 6.924-6.895 (d, J=8.7 Hz, 2H), 5.741 (s, 2H), 3.807 (s, 1H), 3.509 (s, 1H), LC-MS (ESI): 318 [M+H]+
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