Propionyl chloride → 1-methyl-6-(4-(2-(N-propionyl-N-methylamino)ethoxy)-3-(trifluoromethyl)phenyl)-1H-imidazo[4,5-c]pyridine-4-carbonitrile

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To a solution of 1-methyl-6-(4-(2-(methylamino)ethoxy)-3-(trifluoromethyl)-phenyl)-1H-imidazo[4,5-c]pyridine-4-carbonitrile (0.053 mmol, 20 mg) in THF (1 mL) was added DIPEA (0.266 mmol, 47 μL) and propionyl chloride (0.16 mmol, 15 mg). The mixture was stirred at r.t. for 16 h and the product was then purified by HPLC to give 1-methyl-6-(4-(2-(N-propionyl-N-methylamino)ethoxy)-3-(trifluoromethyl)phenyl)-1H-imidazo[4,5-c]pyridine-4-carbonitrile. 1H NMR (CD3OD) δ: 8.37-8.46 (m, 4H), 7.31 (d, 1H), 4.31-4.37 (m, 2H), 3.90 (s, 3H), 3.82-3.90 (m, 2H), 3.01, 3.30 (2xs, 3H), 2.42-2.58 (m, 2H), 1.10-1.15 (m, 3H). MS m/z 432 (M+H).

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