Reaction Steps
To a mixture of 3,5-dichloro-isonicotinic acid (52 mg, 0.27 mmol) in CH2Cl2 (1.1 mL) cooled to 0° C. was added oxalyl chloride (70 μL, 0.81 mmoL) and DMF (1 drop) and the resulting mixture was stirred at 0° C. for 5 minutes and at room temperature for 1.5 hours. The mixture was concentrated under reduced pressure and dried in vacuo for 5 minutes. To the resulting beige solid in THF (3 mL) was added N1-(1H-benzoimidazol-2-ylmethyl)-N1-(5,6,7,8-tetrahydro-quinolin-8-yl)-propane-1,3-diamine from above (100 mg, 0.30 mmol) and Et3N (76 μL, 0.54 mmol) and the resulting mixture was stirred at room temperature for 3 hours. The mixture was concentrated under reduced pressure, diluted with EtOAc (40 mL) and washed consecutively with saturated aqueous NaHCO3 (5 mL) and saturated aqueous NaCl (5 mL). The organic phase was dried (MgSO4), filtered, and concentrated under reduced pressure. Purification by column chromatography on silica gel (CH2Cl2/MeOH/NH4OH, 100:1:1) afforded COMPOUND 153 (55 mg, 40%) as a white foam. 1H NMR (CDCl3) δ 1.70-1.94 (m, 4H), 2.04-2.15 (m, 1H), 2.26-2.33 (m, 1H), 2.64-2.96 (m, 4H), 3.10-3.15 (m, 1H), 3.68 (d, 1H, J=15.6 Hz), 3.80 (d, 1H, J=15.6 Hz), 3.98-4.07 (m, 1H), 4.19-4.25 (m, 1H), 6.83 (dd, 1H, J=7.8, 4.8 Hz), 7.20-7.23 (m, 2H), 7.35-7.40 (m, 2H), 7.66-7.68 (m, 2H), 8.34 (s, 2H), 8.78 (br s, 1H); 13C NMR (CDCl3) δ 21.69, 21.92, 26.70, 29.38, 39.04,49.41, 49.87, 59.45, 111.10, 119.37, 122.63, 122.95, 129.27, 135.68, 138.29, 143.68, 146.10, 147.70, 154.94, 157.51. 162.27. ES-MS m/z 510 (M+H). Anal. Calcd. for C26H26N6Cl2O.0.3CH2Cl2.0.1H2O: C, 58.86; H, 5.03; N, 15.66; Cl, 17.17. Found: C, 59.22; H, 5.21; N, 15.74; Cl, 16.80.
