Potassium Carbonate → 2-(difluoromethyl)-4-methoxy-1-[4-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-1H-benzimidazole

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A mixture of 1-[4-chloro-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-2-(difluoromethyl)-4-methoxy-1H-benzimidazole (Example 2) (200 mg, 0.504 mmol), 4-[(4-methyl-1-piperazinyl)sulfonyl]phenylboronic acid (186 mg, 0.655 mmol), PdCl2 (dppf) (29 mg, 0.0355 mmol), and aq. K2CO3 (2M, 3 mL) in 1,4-dioxane (20 mL) was refluxed under nitrogen for 1 hr. The mixture was cooled to room temperature and diluted with H2O, and the aqueous phase extracted with CH2Cl2 (9×). The combined organic extracts were dried (Na2SO4), and the solvent was removed under vacuum. Chromatography on alumina, eluting with CH2Cl2/MeOH (100:0 to 99.75:0.25), followed by chromatography on silica, eluting with CH2Cl2/MeOH (100:0 to 98:2), and recrystallization from CH2Cl2/MeOH/hexanes gave 2-(difluoromethyl)-4-methoxy-1-[4-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-1H-benzimidazole (93 mg, 31%).

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