[CH2:1]([O:3][C:4]([C:6]1[S:7][C:8]2[CH:14]=[C:13]([C:15]([OH:17])=O)[CH:12]=[CH:11][C:9]=2[CH:10]=1)=[O:5])[CH3:2].C[CH2:19][N:20]=C=NCCCN(C)C.[CH3:29]CN(CC)CC.[OH2:36]>CN(C=O)C>[CH3:29][O:36][N:20]([CH3:19])[C:15]([C:13]1[CH:12]=[CH:11][C:9]2[CH:10]=[C:6]([C:4]([O:3][CH2:1][CH3:2])=[O:5])[S:7][C:8]=2[CH:14]=1)=[O:17]2-(ethoxycarbonyl)-1-benzothiophene-6-carboxylic acid (2.5 g, 10.0 mmol) was dissolved in DMF (20 mL) and cooled to 0° C. EDCI (1.92 g, 10.0 mmol) was added to the reaction followed by (MeO)NHMe·HCl (1.5 g, 15.0 mmol) and then Et3N (1.4 mL, 10.0 mmol). The reaction was allowed to stir for 1 h at 0° C. Water was added to reaction mixture and then extracted with Et2O (3×). The combined organic layers were dried over Na2SO4, filtered, concentrated yielded the crude amide. Purification by flash column chromatography provided the desired amide. 1H NMR (CDCl3, 600 MHz) δ 8.20 (s, 1H), 8.04 (s, 1H), 7.87 (d, J=8.4 Hz, 1H), 7.69 (dd, J=8.4, 1.0 Hz, 1H), 4.39 (d, J=7.2 Hz, 2H), 3.54 (s, 3H), 3.38 (s, 3H), 1.4 (t, J=7.2 Hz, 3H). MS: cal'd (MH+) 294, exp (MH+) 294.
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