反应详情

HCl is passed for 4 hours, with stirring, into a solution of 15.2 g of 2,5-dihydroxyacetophenone and 27.2 g of anisaldehyde in 1,500 ml of ethanol. 3-p-Methoxybenzylidene-6-hydroxy-4'-methoxyflavanone is precipitated, m.p. 199°-201°. 6-Hydroxy-4'-methoxyflavanone and 2,5-dihydroxy-p-methoxybenzylideneacetophenone are formed as intermediates.

1. custom3-p-Methoxybenzylidene-6-hydroxy-4'-methoxyflavanone is precipitated