反应详情

187 a) To a suspension of 1-(3-nitro-phenyl)-piperazine; hydrochloride (1.0 g, 4.1 mmol) and potassium carbonate (0.62 g, 4.5 mmol) in acetonitrile (10 mL) was added 1-fluoro-3-iodo-propane (0.85 g, 4.5 mmol) and was stirred at room temperature for 3 days. The mixture was poured into water (50 mL) and extracted with dichloromethane (3×20 mL). The combined organic layers were washed with saturated aqueous sodium chloride (10 mL), dried over magnesium sulfate, filtered and evaporated. 1-(3-Fluoro-propyl)-4-(3-nitro-phenyl)-piperazine was isolated as a viscous orange oil (0.886 g, 80%). 1H NMR (400 MHz, CDCl3, δ, ppm): 7.71 (s, 1H), 7.65 (d, J=8.2 Hz, 1H), 7.37 (t, J=8.2 Hz, 1H), 7.18 (dd, J=8.3, 1.9 Hz, 1H), 4.54 (ddd, J=47.2, 5.9, 5.9 Hz, 2H), 3.32-3.27 (m, 4H), 2.65-2.60 (m, 4H), 2.55 (t, J=7.2 Hz, 2H), 2.00-1.85 (m, 2H). MS=268 (MH)+. 187 b) 3-[4-(3-Fluoro-propyl)-piperazin-1-yl]-phenylamine was prepared from 1-(3-fluoro-propyl)-4-(3-nitro-phenyl)-piperazine (0.20 g, 0.75 mmol) in a manner analogous to Example 111a. Product isolated as a tan waxy solid (0.18 g, 100%). 1H NMR (400 MHz, CDCl3, δ, ppm): 7.04 (t, J=8.1 Hz, 1H), 6.36 (d, J=8.3 Hz, 1H), 6.26 (s, 1H), 6.21 (d, J=7.9 Hz, 1H), 4.62-4.44 (m, 2H), 3.60 (br s, 2H), 3.20-3.15 (m, 4H), 2.62-2.57 (m, 4H), 2.53 (t, J=7.2 Hz, 2H), 2.00-1.85 (m, 2H). MS=238 (MH)+. 187 c) {3-[4-(3-Fluoro-propyl)-piperazin-1-yl]-phenyl}-[8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine was prepared from 2-chloro-8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridine (220.0 mg, 0.7148) and 3-[4-(3-fluoro-propyl)-piperazin-1-yl]-phenylamine (180.0 mg, 0.7585 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (60.0 mg, 0.110 mmol) as the ligand in a manner analogous to Example 2d. Product isolated as a tan solid (0.264 g, 73%). MP=157-169° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.49 (d, J=6.7 Hz, 1H), 8.26 (d, J=8.0 Hz, 2H), 8.09 (d, J=8.0 Hz, 2H), 7.66 (d, J=7.4 Hz, 1H), 7.46 (br s, 1H), 7.22 (t, J=8.0 Hz, 1H), 7.02 (t, J=7.0 Hz, 1H), 6.93 (d, J=7.6 Hz, 1H), 6.89 (s, 1H), 6.59 (d, J=8.0 Hz, 1H), 4.64-4.48 (m, 2H), 3.30 (br s, 4H), 3.11 (s, 3H), 2.93-2.40 (m, 6H), 2.08-1.90 (m, 2H). MS=509 (MH)+.

1. extractionextracted with dichloromethane (3×20 mL)
2. washThe combined organic layers were washed with saturated aqueous sodium chloride (10 mL)
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. customevaporated