3-Aminopyridine → HCID 86679703, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(pyridin-3-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carboxylic acid (CXXXIII) (0.39 g, 1.21 mmol) and 3-aminopyridine (CXXVII) (0.11 g, 1.21 mmol) in DMF (4.0 mL) was added N,N-diisopropylethylamine (0.42 mL, 1.21 mmol). The solution was cooled to 0° C. before adding HATU (0.46 g, 1.21 mmol). The ice bath was removed, and the reaction warmed to room temperature and stirred for 2 h. The DMF was removed under reduced pressure, and the residue was partitioned between chloroform and water. The organic phase was separated and washed sequentially with water and brine, dried over MgSO4, filtered, and concentrated. The product was purified by column chromatography using a 25 g Thomson normal phase silica gel cartridge (100% CHCl3→2:98 MeOH:CHCl3) to afford N,5-di(pyridin-3-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-3-carboxamide (CXXXIV) (0.36 g, 0.90 mmol, 75% yield) as an off-white solid. 1H NMR (DMSO-d6) δ ppm 10.56 (s, 1H), 9.06 (d, J=2.4 Hz, 1H), 8.94 (d, J=2.3 Hz, 1H), 8.60 (dd, J=4.8, 1.5 Hz, 1H), 8.47 (d, J=1.1 Hz, 1H), 8.34-8.33 (m, 1H), 8.31-8.29 (m, 1H), 8.16-8.14 (m, 1H), 8.04 (d, J=8.8 Hz, 1H), 7.90 (dd, J=8.8, 1.8 Hz, 1H), 7.54-7.52 (m, 1H), 7.43-7.41 (m, 1H), 7.43-7.41 (m, 1H), 6.08-6.06 (m, 1H), 4.01-3.99 (m, 1H), 3.87-3.82 (m, 1H), 2.64-2.57 (m, 1H), 2.11-2.06 (m, 2H), 1.84-1.80 (m, 1H), 1.69-1.65 (m, 2H); ESIMS found for C23H21N5O2 m/z 400 (M+H).

Provenance & Evidence