Hydrochloric Acid → HCID 66643096, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 8-(2-methoxy-5-nitrophenyl)-1,4-dioxa-8-azaspiro[4.5]decane (Preparation Example 495) (795 mg) and dioxane (16 mL), 4M hydrochloric acid (6.8 mL) was added and stirred overnight at 80° C. The reaction liquid was concentrated under reduced pressure, and saturated aqueous sodium hydrogen carbonate was added to the concentrate. The concentrate was extracted with chloroform and then washed with saturated aqueous sodium chloride. After drying over anhydrous sodium sulfate, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography (eluent; ethyl acetate:n-hexane) to give 1-(2-methoxy-5-nitrophenyl)piperidin-4-one (296 mg).

Provenance & Evidence