1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → N-(2-hydroxy-2,2-diphenylethyl)-4-(2-(pyridine-2-ylamino)thiazol-5-ylthio)picolinamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(2-(pyridine-2-ylamino)thiazol-5-ylthio)picolinic acid (0.063 g, 0.19 mmol) and 2-amino-1,1-diphenylethanol (0.060 g, 0.28 mmol, 1.5 eq, described in Example D) in NMP (3 mL), was added EDAC (0.055 g, 0.28 mmol, 1.5 eq), HOBt (0.026 g, 0.19 mmol, 1 eq) and diisopropylethylamine (0.100 mL, 0.57 mmol, 3 eq). The resulting mixture was stirred at 23° C. for 3.5 h. The mixture was purified on preparative HPLC (ammonium acetate/water/acetonitrile) and freeze dried to give the title compound as a solid (0.024 mg, 24%). The product was converted to the HCl salt by dissolving it in ethyl acetate (2 mL) and tetrahydrofuran (2 mL) and treating the mixture with a solution of HCl (4.0 M in dioxane, 0.011 mL, 0.045 mmol, 1 eq). The mixture was concentrated, then diluted with water and lyophilized to give the HCl salt of the title material (0.029 g) as a solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 4.10 (2H, d, J=5.56 Hz), 6.30 (1H, s), 7.01 (1H, dd, J=6.69 and 5.43 Hz), 7.11-7.20 (3H, m), 7.28 (4H, t, J=7.71 Hz), 7.37 (1H, dd, J=5.31, 2.02 Hz), 7.42-7.48 (4H, m), 7.66 (1H, d, J=1.52 Hz), 7.79 (1H, ddd, J=9.22, 6.32 and 1.89 Hz), 8.31 (1H, dd, J=5.43 and 1.39 Hz), 8.40 (1H, t, J=4.80 Hz), 8.41 (1H, d, J=4.8 Hz), 11.86 (1H, s). LC/MS (M+H)+: 526. Ret. time: 2.00 (Condition D). HRMS: calcd: 526.1371; found: 526.1387.

Provenance & Evidence