反应详情

To 2.24 g of thiourea were added 60 ml of ethanol and 2.5 ml of concentrated hydrochloric acid, followed by stirring. Then a solution of 8.0 g of p-xyloquinone in ethanol (120 ml) was slowly added dropwise thereto. The reaction mixture was stirred at room temperature for 24 hours and then concentrated to about one-half. The crystals thus precipitated were separated by filtering and washed with a small amount of ethanol. Thus 6.80 g of the title compound was obtained in the form of white crystals.

1. stirringThe reaction mixture was stirred at room temperature for 24 hours
2. concentrationconcentrated to about one-half
3. customThe crystals thus precipitated
4. customwere separated
5. filtrationby filtering
6. washwashed with a small amount of ethanol