Hydrochloric Acid → HCID 178430811, compound

Participants

Reaction Steps

A mixture of 3-methyl-6-phenyl-4,5,6,7-tetrahydroindol-4-one (0.8 g), aminoguanidine hydrochloride (0.41 g), concentrated hydrochloric acid (0.18 ml), water (0.18 ml) and ethanol (50 ml) was refluxed for 30 minutes. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in water. The solution was washed with diethylether. To the mixture was added sodium hydroxide solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, and dried with magnesium sulfate. Under reduced pressure, the solvent was evaporated, and to the residue was 1N hydrochloric acid (2 ml). The solvent was evaporated, and the residue was recrystallized from ethanol-ethyl acetate to give 4-guanidinoimino-3-methyl-6-phenyl-4,5,6,7-tetrahydroindole hydrochloride (Compound 2) (0.1 g) as colorless crystals.

Provenance & Evidence