Acetic Anhydride → 4-Fluoro-3-(2-(3-(methylsulfinyl)-6-(morpholine-4-carbonyl)-1H-indol-1-yl)pyrimidin-5-yl)phenyl acetate

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Reaction Steps

Acetic anhydride (0.18 mL, 1.9 mmol) was added at 0° C. to 264a) (0.45 g, 0.94 mmol) in pyridine (2.0 mL) and the resulting solution was stirred at room temperature for 3 h. The reaction mixture was diluted with cold water and extracted with dichloromethane/methanol (9:1; 3×30 mL). The organic layers were washed with saturated sodium hydrogen carbonate solution (2×20 mL) and brine (20 mL), dried over sodium sulfate and evaporated. The remnant was purified by flash column chromatography [silica; dichloromethane with 1.5% methanol]. Yield: 0.09 g (38% of theory)

Provenance & Evidence