m-Chloroperbenzoic acid → (1S,4S)-tert-Butyl 5-(3-(methylsulfinyl)-1-(5-(pyridin-2-yl)pyrimidin-2-yl)-1H-indole-6-carbonyl)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate

Participants

Reaction Steps

m-Chloroperoxybenzoic acid (0.114 g, 0.66 mmol, 0.9 eq) was added at 0° C. to a stirred solution of 244c) (0.400 g, 0.61 mmol, 1 eq) in dichloromethane (30 mL). The reaction mixture was stirred for 3 h at room temperature, then diluted with dichloromethane (50 mL) and successively washed with saturated sodium hydrogen carbonate solution (2×30 mL) and brine (30 mL). The organic layer wasdried over sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography [230-400 mesh silica gel, dichloromethane/methanol=95:5]. White solid. Yield: 0.290 g (71% of theory)

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