Cl[C:2]1[C:7]([I:8])=[CH:6][CH:5]=[CH:4][N:3]=1.[N:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[NH:15][C:16]1[CH:21]=[CH:20][C:19]([OH:22])=[CH:18][CH:17]=1.C(=O)([O-])[O-].[Cs+].[Cs+].O>CS(C)=O>[I:8][C:7]1[C:2]([O:22][C:19]2[CH:18]=[CH:17][C:16]([NH:15][C:10]3[CH:11]=[CH:12][CH:13]=[CH:14][N:9]=3)=[CH:21][CH:20]=2)=[N:3][CH:4]=[CH:5][CH:6]=1To a 250-mL round-bottomed flask was added 2-chloro-3-iodopyridine (5.32 g, 22.22 mmol), 4-(pyridin-2-ylamino)phenol (4.96 g, 26.6 mmol) and cesium carbonate (11.27 g, 34.6 mmol) in DMSO (100 mL) and the reaction was heated at 80° C. overnight. The reaction was cooled to rt and poured into water (400 mL). The solution was extracted with EtOAc (4×100 mL) and the combined organic layers were washed with brine and dried over Na2SO4. The solution was filtered, evaporated onto silica gel and purified by flash chromatography (Isco, (330 gram)) eluting with 2M NH3 in MeOH:CH2Cl2 (0:1→1:19). The material was dissolved in MeOH, evaporated onto silica gel and further purified by flash chromatography (Isco (330 gram)) eluting with EtOAc:hexanes (0:1→3:1) to give a white amorphous solid. MS (ESI, pos. ion) m/z: 389.9. IC50 (uM)=0.2284.
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