[CH3:1][N:2]([CH3:9])[CH:3]1[CH2:8][CH2:7][NH:6][CH2:5][CH2:4]1.[Br:10][C:11]1[N:12]=[N:13][C:14](Br)=[CH:15][CH:16]=1.C(N(CC)CC)C>C1COCC1>[Br:10][C:11]1[N:12]=[N:13][C:14]([N:6]2[CH2:7][CH2:8][CH:3]([N:2]([CH3:9])[CH3:1])[CH2:4][CH2:5]2)=[CH:15][CH:16]=1N,N-dimethylpiperidin-4-amine (0.505 g, 3.94 mmol), 3,6-dibromopyridazine (0.511 g, 2.15 mmol), and triethylamine (0.599 mL, 4.30 mmol) were combined in 5 mL of THF. The solution was heated at 70° C. for 17 hours. The solution was cooled to room temperature and then purified on CombiFlash column (dry loaded), eluting with 10% methanol/0.5% NH4OH (˜28% in water)/DCM isocratic. The fractions containing the product were combined and concentrated under vacuum to give compound 201 (0.550 g, 89.8% yield) as an off white solid. 1H NMR (500 MHz, MeOD-d3) δ 7.51 (1 H, d, J=9.8 Hz), 7.24 (1 H, d, J=9.8 Hz), 4.45 (2 H, d, J=13.7 Hz), 2.98 (2 H, td, J=13.0, 2.2 Hz), 2.61 (1 H, tt, J=11.5, 3.8 Hz), 2.38 (6 H, s), 1.99-2.07 (2 H, m), 1.45-1.58 (2 H, m, J=12.5, 12.2, 12.2, 4.2 Hz) ppm; LCMS-ESI (POS), M/Z, M+1: Found 285.0.
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