Potassium Acetate → N-(5-(2-(cyanoimino)-1-(6-(2-cyanopropan-2-yl)pyridin-3-yl)-3-methyl-2,3-dihydro-1H-imidazo[4,5-c]quinolin-8-yl)-3-(trifluoromethyl)pyridin-2-yl)-2-propylpentanamide

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Reaction Steps

N-(8-(6-amino-5-(trifluoromethyl)pyridin-3-yl)-1-(6-(2-cyanopropan-2-yl)pyridin-3-yl)-3-methyl-1H-imidazo[4,5-c]quinolin-2(3H)-ylidene)cyanamide (Example 5, 0.379 mmol) was stirred in valproic anhydride (5 mL). Potassium acetate (0.379 mmol) was added to it and the reaction was carried out at 110-115° C. for 2 h. The reaction mixture was cooled, diluted with water and extracted with ethyl acetate. Organic layer was concentrated, dried using anhydrous sodium sulfate and purified on silica gel column to obtain the title compound. 1H NMR (300 MHz, DMSO-d6): δ 10.21 (s, 1H), 9.32 (s, 1H), 9.08 (s, 1H), 8.63 (s, 1H), 8.44 (d, J=5.1 Hz, 1H), 8.28 (d, J=5.1 Hz, 1H), 8.18-8.15 (m, 1H), 8.01 (d, J=5.1 Hz, 1H), 7.06 (s, 1H), 3.94 (s, 3H), 1.77 (s, 3H), 1.56 (m, 2H), 1.35 (s, 6H), 1.23 (s, 1H), 0.91 (s, 6H); MS (m/z): 654.4 (M+1)+.

Provenance & Evidence