Phosphorus oxychloride → 6-(Morpholine-4-carbonyl)-1H-indole-3-carbaldehyde

Participants

Reaction Steps

(1H-Indol-6-yl)(morpholino)methanone (36.0 g, 156.5 mmol) in DMF (540 mL) was added drop wise at 0° C. to a solution of phosphoryl chloride (43.9 mL, 469 mmol) in DMF (884 mL) and the mixture was stirred at room temperature for 4 h. The reaction mixture was then neutralized with saturated sodium hydrogen carbonate solution and extracted with ethyl acetate (3×). The combined organic layers were dried over sodium sulfate and evaporated. The residue was finally purified by column chromatography [100-200 mesh silica; dichloromethane with 10% methanol]. White solid. Yield: 36 g (89% of theory)

Provenance & Evidence