反应详情

To a mixture of 7-(2,5-dichlorothiophen-3-yl)-4-methyl-5,6,7,8-tetrahydrocinnolin-5-one (0.203 g) and aminoguanidine hydrochloride (80 mg) were added ethanol (6 ml) and concentrated hydrochloric acid (0.1 ml), and the mixture was refluxed for 1.5 hours and cooled. Precipitated crystals were filtered, washed with ethanol and dried to give 7-(2,5-dichlorothiophen-3-yl)-5-guanidinoimino-4-methyl-5,6,7,8-tetrahydrocinnoline hydrochloride (Compound 131) (0.25 g) as crystals.

1. temperaturethe mixture was refluxed for 1.5 hours
2. temperaturecooled
3. customPrecipitated crystals
4. filtrationwere filtered
5. washwashed with ethanol
6. customdried