反应详情

N-(3-Amino-pyridin-2-yl)-N-methyl-methanesulfonamide was prepared from N-methyl-N-(3-nitro-pyridin-2-yl)-methanesulfonamide (6.20 g, 26.8 mmol)(prepared as described in J. Med. Chem., 2007, 50, 3431) via hydrogenation using a Paar apparatus with 10% Palladium on Carbon (50% Wet)(5:45:50, Palladium:carbon black:Water, 5.71 g, 2.68 mmol) and Hydrogen (50 psi) in 2:1 ethyl acetate:methanol (150 mL). The mixture was shaken on a Paar apparatus until adsorption of hydrogen ceased. The mixture was degassed, backflushed with nitrogen, filtered through a plug of diatomaceous earth and rinsed with dichloromethane. The filtrate was evaporated under reduced pressure. Product isolated as brown solid (5.15 g, 95%). 1H NMR (400 MHz, CDCl3, δ, ppm): 7.85 (dd, J=3.7, 2.5 Hz, 1H), 7.10-7.08 (m, 2H), 4.24 (br s, 2H), 3.23 (s, 3H), 3.08 (s, 3H). MS=202 (MH)+. 111b) N-[3-(2-Chloro-[1,2,4]triazolo[1,5-a]pyridin-8-ylamino)-pyridin-2-yl]-N-methyl-methanesulfonamide was prepared from N-(3-amino-pyridin-2-yl)-N-methyl-methanesulfonamide (238.0 mg, 1.183 mmol) and 8-bromo-2-chloro-[1,2,4]triazolo[1,5-a]pyridine (250.0 mg, 1.075 mmol) in a manner analogous to Example 2d. Product isolated as a pale yellow foam (0.185 g, 48%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.18-8.15 (m, 1H), 8.11 (d, J=6.8 Hz, 1H), 7.81 (d, J=8.0 Hz, 1H), 7.50 (s, 1H), 7.32-7.25 (m, 1H), 7.17 (d, J=7.5 Hz, 1H), 6.93 (t, J=7.3 Hz, 1H), 3.31 (s, 3H), 3.07 (s, 3H). MS=353, 355 (MH)+. 111c) N-Methyl-N-(3-{2-[3-(4-methyl-piperazin-1-yl)-phenylamino]-[1,2,4]triazolo[1,5-a]pyridin-8-ylamino}-pyridin-2-yl)-methanesulfonamide was prepared from N-[3-(2-chloro-[1,2,4]triazolo[1,5-a]pyridin-8-ylamino)-pyridin-2-yl]-N-methyl-methanesulfonamide (75.0 mg, 0.212 mmol) and 3-(4-methylpiperazin-1-yl)aniline (45.0 mg, 0.235 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (23.0 mg, 0.0421 mmol) as the ligand in a manner analogous to Example 2d. Product isolated as a brown foam (0.017 g, 16%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.11-8.06 (m, 2H), 7.78 (d, J=7.5 Hz, 1H), 7.52 (s, 1H), 7.28-7.19 (m, 3H), 7.12 (d, J=7.5 Hz, 1H), 7.06 (d, J=7.9 Hz, 1H), 6.84 (s, 1H), 6.78-6.73 (m, 1H), 6.57 (d, J=8.0 Hz, 1H), 3.32 (s, 3H), 3.29-3.24 (m, 4H), 3.09 (s, 3H), 2.62-2.57 (m, 4H), 2.36 (s, 3H). MS=518 (MH)+.