反应详情

温度

0 °C

To a hot solution of 10 g 4,4'-dimethylbenzil in 20 ml of ethanol is added 2.1 g of hydrazine hydrate. After a few minutes at reflux, a solid begins to crystallize. Heating is continued for 10 min. and the solution cooled slowly to 0° C. The solid is filtered off and washed with cold ethanol. The product is recrystallized from ethanol. Yield 7.1 g. M.P. 137°-140°.

1. temperatureAfter a few minutes at reflux
2. customto crystallize
3. temperatureHeating
4. filtrationThe solid is filtered off
5. washwashed with cold ethanol
6. customThe product is recrystallized from ethanol