反应详情

A mixture of 4-methyl-7-(2-methylphenyl)-5,6,7,8-tetrahydroquinolin-5-one (0.30 g), aminoguanidine hydrochloride (0.14 g), concentrated hydrochloric acid (0.018 ml), water (0.018 ml) and ethanol (30 ml) was refluxed for 7 hours. Under reduced pressure, the solvent was evaporated, and the residue was dissolved in water. The solution was washed with ethyl acetate and concentrated under reduced pressure, and the residue was recrystallized from ethyl acetate-ethanol to give 5-guanidinoimino-4-methyl-7-(2-methylphenyl)-5,6,7,8-tetrahydroquinoline hydrochloride (Compound 57) (0.4 g) as colorless crystals.

1. temperaturewas refluxed for 7 hours
2. customUnder reduced pressure, the solvent was evaporated
3. dissolutionthe residue was dissolved in water
4. washThe solution was washed with ethyl acetate
5. concentrationconcentrated under reduced pressure
6. customthe residue was recrystallized from ethyl acetate-ethanol