C(Cl)CCl.Cl.[NH2:6][C:7]1[CH:17]=[CH:16][C:10]([CH:11]=[CH:12][C:13]([OH:15])=O)=[CH:9][CH:8]=1.[CH3:18][N:19]1[C:27]2[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=2)[CH:21]=[C:20]1[CH2:28][NH:29][CH3:30].C1C=CC2N(O)N=NC=2C=1.O.C(N(CC)CC)C>CN(C=O)C>[NH2:6][C:7]1[CH:8]=[CH:9][C:10](/[CH:11]=[CH:12]/[C:13]([N:29]([CH3:30])[CH2:28][C:20]2[N:19]([CH3:18])[C:27]3[C:22]([CH:21]=2)=[CH:23][CH:24]=[CH:25][CH:26]=3)=[O:15])=[CH:16][CH:17]=1EDC (218 mg, 1.14 mmole) was added to a solution of 4-aminocinnamic acid hydrochloride (220 mg, 1.10 mmole), 1-methyl-2-(methylaminomethyl)-1H-indole (0.20 g, 1.15 mmole), HOBt H2O (154 mg, 1.14 mmole), and triethylamine (0.20 mL, 1.43 mmole) in DMF (20 nL) at RT. The reaction was stirred overnight, then was concentrated in vacuo. The residue was diluted with 5% NaHCO3 and extracted with CH2Cl2. The combined organic extracts were washed with brine (2×30 mL) and dried over MgSO4. Flash chromatography on silica gel (3% MeOHICH2Cl2) gave the title compound (68 mg, 19%) as a yellow foam: 1 H NMR (360 MHz, DMSO-d6, 330K) δ 7.46 (d, J=7.8 Hz,1H), 7.42 (d, 3=15.3 Hz,1H), 7.37 (d, J=8.3 Hz,1H), 7.32 (d, J=8.5 Hz, 2H), 7.06-7.15 (m,1H), 6.94-7.03 (m, 1H). 6.81 (d, J=15.3 Hz,1H), 6.58 (d, J=8.5 Hz, 2H), 6.33 (s, 1H), 5.25 (br s, 2H), 4.85 (s, 2H), 3.70 (s, 3H), 3.02 (s, 3H); MS (ES) m/e 320 (M+H)+. Anal. Calcd for C20H21N3O0.20H2O: C, 74.37; H, 6.68; N, 13.01. Found: C, 74.21; H, 6.60; N, 12.80.
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