Dichloromethane → 7-(2-Fluoro-4-nitrophenoxy)-2-(1-methyl-1H-imidazol-5-yl)thieno[3,2-b]pyridine

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A mixture of the compound 16 (1.52 g, 6.09 mmol), 2-fluoro-4-nitrophenol (3.87 g, 24.6 mmol) and K2CO3 (4.31 g, 31.2 mmol) in Ph2O (20 mL) was heated at 190° C. overnight. DCM (250 mL) was added to the resultant dark-brown mixture, which was then extracted with aqueous 1M HCl. The aqueous layer was collected, washed with DCM and basified with NH4OH. The resultant cloudy mixture was extracted with DCM. The organic phase was combined, filtered; the filtrate was washed with water, dried over anhydrous Na2SO4 and concentrated under reduced pressure. The resultant yellow solid was purified by flash chromatography, eluent EtOAc/MeOH (80:20) to afford title-compound 17 as a yellow solid (0.96 g, 43% yield). MS (m/z): 371.0 (M+H).

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