Hydrochloric Acid → HCID 178430222, compound

Participants

Reaction Steps

A mixture of 1,3-dimethyl-6-phenyl-4,5,6,7-tetrahydroindol-4-one (0.31 g), aminoguanidine hydrochloride (0.15 g), concentrated hydrochloric acid (0.065 ml), water (0.065 ml) and ethanol (50 ml) was refluxed for 5 hours. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in water. The solution was washed with diethylether, and to the mixture was added sodium hydrogen carbonate solution. The mixture was extracted with ethyl acetate, and the organic layer was dried with magnesium sulfate. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in ethanol. To the solution was added 1N hydrochloric acid. The solvent was evaporated, and the residue was recrystallized from ethanol-ethyl acetate to give 4-guanidinoimino-1,3-dimethyl-6-phenyl-4,5,6,7-tetrahydroindole hydrochloride (Compound 8) (0.1 g) as colorless crystals.

Provenance & Evidence