Potassium Carbonate → 3-Chloro-N-[2-(4-isoquinolinyl)-3,6-dimethylthieno[2,3-b]pyridin-4-yl]benzenesulfonamide

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To a solution of N-(2-bromo-3,6-dimethylthieno[2,3-b]pyridin-4-yl)-3-chlorobenzenesulfonamide (Example 77) (100 mg, 0.232 mmol) in 1,4-dioxane (2 mL) and water (1 mL) was added 4-isoquinolinylboronic acid (40.1 mg, 0.232 mmol), bis(triphenylphosphine)palladium(II) chloride (16.26 mg, 0.023 mmol) and potassium carbonate (112 mg, 0.811 mmol) and the mixture heated at 100° C. for 1 h using a microwave reactor. The mixture was then filtered through celite, washing with ethyl acetate (30 mL) and the filtrate evaporated to dryness. The residue was then purified by MDAP (acidic conditions), to afford the title compound (41.45 mg). LCMS (A) m/z: 480 [M+1]+, Rt 1.13 min (acidic).

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