反应详情

In 40 ml of ethanol were dissolved 20.4 g of the 2'-hydroxy-4',6'-bis(methoxymethoxy)-3'-(2-propenyl)acetophenone obtained in Production Example 6 and 13.7 g of the p-methoxymethoxybenzaldehyde obtained in Production Example 23, and a 50% solution of potassium hydroxide in ethanol was added to the solution and the mixture was stirred at room temperature overnight to effect a reaction. After the reaction, the reaction mixture was neutralized with dilute hydrochloric acid and extracted with ethyl acetate, and the solvent was removed from the ethyl acetate layer by distillation. The obtained residue was crystallized from methanol to obtain 26.3 g (yield=85.9%) of 2'-hydroxy-4,4',6'-tris(methoxymethoxy)-3'-(2-propenyl)chalcone in the form of a yellow prism.