[C:1]1([NH:7][C:8]2[C:16]3[C:15]4[CH2:17][NH:18][CH2:19][CH2:20][C:14]=4[NH:13][C:12]=3[N:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:21](OC(=O)C)(=[O:23])[CH3:22].C(N(CC)CC)C>ClCCCl>[C:1]1([NH:7][C:8]2[C:16]3[C:15]4[CH2:17][N:18]([C:21](=[O:23])[CH3:22])[CH2:19][CH2:20][C:14]=4[NH:13][C:12]=3[N:11]=[CH:10][CH:9]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1Phenyl-(6,7,8,9-tetrahydro-5H-dipyrido[2,3-b;3′,4′-d]pyrrol-4-yl)-amine (40 mg, 0.15 mmol), acetic anhydride (18 mg, 0.18 mmol), and triethylamine (0.06 mL, 0.45 mmol) were dissolved in 1,2-dichloroethane (2.0 mL), and stirred overnight at room temperature. The reaction mixture was added directly to a Biotage column. The crude product was purified via Biotage eluting with CH2Cl2/MeOH (9/1, v/v) to provide 8 (5 mg, 11% yield) as a tan solid. LC-MS (M+H=307, obsd.=307).
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