A facile two step synthesis of 3-aroylcoumarin-flavone hybrids was achieved from 7-hydroxyflavone and α- oxoketene dithioacetals. In the first step 7-hydroxyflavone was regioselectively formylated under Duff reaction conditions. Resulting 8-formyl-7-hydroxy flavones were condensed with α-oxoketene dithioacetals in the presence of a catalytic amount of piperidine to furnish 3-aroylcoumarin-flavone hybrids.
一种简单的两步合成方法成功合成了3-芳酰
香豆素-
黄酮杂化物,反应物为
7-羟基黄酮和α-氧代酮二
硫代乙酰材料。在第一步中,
7-羟基黄酮在Duff反应条件下进行了区域选择性醛化。生成的8-醛-
7-羟基黄酮与α-氧代酮二
硫代乙酰材料在催化量
哌啶的存在下进行缩合,得到3-芳酰
香豆素-
黄酮杂化物。