反应详情

A solution of 6,7-diethyl-2-hydroxy-1,4-naphthoquinone (22 g; 0.096 mole) in thionyl chloride (250 ml) was refluxed for 12 hours and the solvent removed in vacuo. Repeated evaporation with dry benzene gave an orange solid which after recrystallisation from ethanol in the presence of charcoal weighed 18.04 g (76%) and had m.p. 90°-92° C. (Found; C, 67.21; H, 5.39; Cl, 14.21; C14H13ClO2 requires; C, 67.61; H, 5.27; Cl, 14.26%).

1. customthe solvent removed in vacuo
2. customevaporation with dry benzene
3. customgave an orange solid which
4. customafter recrystallisation from ethanol in the presence of charcoal