To a reflux apparatus add with stirring add 18.4 g of dibromochalcone and 16.5 mL of methanol, to this solution rapidly add a solution made from 2.3 g of sodium and 23 mL of methanol, reflux for 1h. After the reflux, acidify the mixture with some HCl and reflux again for 5 minutes, pour the mixture to 160 mL of ice, filter and wash with 50 mL of cold methanol. Recrystallize the crude product from hot methanol.
The mixture after the reflux
The mixture after the addition of the HCl
The crude product
The recrystallized product