反应详情

温度

20 °C

20 ml of water and 17.0 g of purified potassium ethylxanthate were added to 20.0 g of 5,6-diamino-1,1,3,3-tetramethyl-2-indanone, dissolved in 200 ml of alcohol, in a 750 ml sulfonation flask equipped with stirrer, thermometer, reflux condenser. The mixture was left to boil at reflux overnight, then diluted with 200 ml of water, neutralized with 20 ml of glacial acetic acid and stirrer at 60°-70° C. for an additional 1 hour. After cooling to 20° C., were removed by filtration under suction. There were obtained 18.8 g (78.9% of theory) of 5,7-dihydro-2-mercapto-5,5,7,7-tetramethylindeno(5,6-d)-imidazol-6(1H)-one with a melting point above 300° C.

1. customequipped with stirrer
2. temperaturethermometer, reflux condenser
3. waitThe mixture was left
4. temperatureat reflux overnight
5. customwere removed by filtration under suction