N,N-Dimethylaniline → 5-Allyl-2,3-dihydro-4-hydroxy-3,3-dimethyl-1H-indol-2-one

Participants

Reaction Conditions

Reaction Steps

914 mg (4.21 mmol) of 4-allyloxy-2,3-dihydro-3,3-dimethyl-1H-indol-2-one was added to 4 ml of N,N-dimethylaniline, and the mixture was heated for 30 hours at 205° C. while stirring. After the reaction, N,N-dimethylaniline was evaporated under reduced pressure. The residue was dissolved in chloroform, washed with water, 2N hydrochloric acid, and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue obtained was purified by column chromatography (silica gel, chloroform:ethyl acetate=20:1), washed with ether-n-hexane, and filtered to obtain 890 mg (yield: 97.4%) of a brown oil of the title compound.

Provenance & Evidence