Pyridine → 1-cyclopentyl-N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-6-[(phenylsulfonyl)amino]-1H-indazole-4-carboxamide

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Reaction Steps

6-amino-1-cyclopentyl-N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-1H-indazole-4-carboxamide (30 mg, 0.079 mmol) was suspended in DCM (3 mL) followed by pyridine (0.032 mL, 0.395 mmol). The contents were vigorously stirred and then benzenesulfonyl chloride (0.011 mL, 0.087 mmol) was added and the contents stirred at RT for 1 h. The volatiles were removed in vacuo and dried on hi-vac for 1 h. The crude product was purified by reverse phase HPLC (Gradient B: 15-70%. A: Water+0.1% TFA. B: CH3CN+0.1% TFA). The product was neutralized with water and sat. NaHCO3, and extracted with 10% THF/EtOAC (hot) in duplicate. The combined organic layers were dried over MgSO4, filtered, and concentrated in vacuo. The solid was concentrated from DCM and dried in vacuum oven for 4 h at 45° C. The title compound was collected as 30 mg (72%); 1H NMR (400 MHz, DMSO-d6) δ ppm 1.68 (td, J=5.49, 3.41 Hz, 2H), 1.75-1.94 (m, 4H), 1.99-2.10 (m, 2H), 2.12 (s, 3H), 2.20 (s, 3H), 4.30 (d, J=5.05 Hz, 2H), 4.89-5.04 (m, 1H), 5.89 (s, 1H), 7.22 (d, J=1.52 Hz, 1H), 7.36 (s, 1H), 7.48-7.63 (m, 3H), 7.77-7.84 (m, 2H), 8.11 (s, 1H), 8.36 (t, J=5.05 Hz, 1H), 10.56 (s, 1H), 11.55 (s, 1H); LC-MS (ES) m/z=519.2 [M+H]

Provenance & Evidence