1,4-Dioxane → 1-(5-(2-(4-(1H-benzo[d]imidazole-2-carbonyl)phenoxy)pyridin-3-yl)-3,4-dihydropyridin-1(2H)-yl)ethanone

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To a degassed solution of (1H-benzo[d]imidazol-2-yl)(4-(3-bromopyridin-2-yloxy)phenyl)methanone (706 mg, 1.791 mmol), 1-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydropyridin-1(2H)-yl)ethanone (0.5 g, 1.991 mmol), potassium acetate (1.5 g, 15.28 mmol), and dioxane (10 mL) was added A-Phos (140 mg, 0.198 mmol). The solution was stirred at 80° C. After 16 hours, the reaction was allowed to cool to room temperature, diluted with H2O (10 mL), and the aqueous layer extracted with DCM (5 mL). The combined organic layers were concentrated in vacuo and purified by Prep TLC (1:1 hexanes/EtOAc) to give 1-(5-(2-(4-(1H-benzo[d]imidazole-2-carbonyl)phenoxy)pyridin-3-yl)-3,4-dihydropyridin-1(2H)-yl)ethanone (1.6 mg, 3.65 μmol) as a light yellow film. MS (ESI, pos. ion) m/z: 439.0 (M+1). IC50 (uM) +++++.

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