m-Chloroperbenzoic acid → 3-(tert-butyl-5-fluoro-6-(methylsulfinyl)pyrimidin-2-yl)-5-chloro-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

To the solution of 3-(tert-butyl-5-fluoro-6-(methylthio)pyrimidin-2-yl)-5-chloro-1H-pyrrolo[2,3-b]pyridine, 40b, (0.05 g, 0.11 mmol) in CH2Cl2 (3.4 mL) was added mCPBA (0.02 g, 0.11 mmol). The reaction mixture was stirred for 1 h. The reaction mixture was diluted with CH2Cl2 (10 mL) and saturated NaHCO3 solution (5 mL). The aqueous layer was extracted with CH2Cl2 (10 mL). The combined organic phases were washed again with aqueous saturated NaHCO3 solution, dried over Na2SO4, filtered and concentrated in vacuo to afford the desired product that was used without further purification.

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