反应详情

To a solution of 7-(2-chloro-5-fluorophenyl)-4-methyl-5,6,7,8-tetrahydroquinolin-5-one in ethanol (10 ml) were added aminoguanidine hydrochloride (0.041 g), concentrated hydrochloric acid (0.078 ml) and water (0.078 ml), and the mixture was refluxed for 4 hours. Under reduced pressure, the solvent was evaporated, and to the residue was added water. The aqueous layer was washed with ethyl acetate, and to the aqueous layer was added sodium hydrogen carbonate solution to make it alkaline. The solution was extracted with ethyl acetate, and the organic layer was washed with water and saturated brine, dried with magnesium sulfate, and concentrated under reduced pressure. The residue was dissolved in 1N hydrochloric acid (1 ml) and concentrated to give crystals, which were recrystallized from ethanol-ethyl acetate to give 7-(2-chloro-5-fluorophenyl)-5-guanidinoimino-4-methyl-5,6,7,8-tetrahydroquinoline hydrochloride (Compound 170) (0.05 g) as colorless crystals.

1. temperaturethe mixture was refluxed for 4 hours
2. customUnder reduced pressure, the solvent was evaporated
3. additionto the residue was added water
4. washThe aqueous layer was washed with ethyl acetate
5. additionto the aqueous layer was added sodium hydrogen carbonate solution
6. extractionThe solution was extracted with ethyl acetate
7. washthe organic layer was washed with water and saturated brine
8. dry with materialdried with magnesium sulfate
9. concentrationconcentrated under reduced pressure
10. dissolutionThe residue was dissolved in 1N hydrochloric acid (1 ml)
11. concentrationconcentrated
12. customto give crystals, which
13. customwere recrystallized from ethanol-ethyl acetate