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7-羟基黄酮类化合物及其衍生物具有解痉、扩张冠状动脉血管等作用。本文报道在不保护原料羟基的情况下,直接用I_2-DMSO-H_2SO_4系统,可将2＇,4＇
7-hydroxy flavonoids and their derivatives with antispasmodic, dilate coronary artery and other effects. In this paper, I 2-DMSO-H 2 SO 4 system can be directly used to protect 2 ’, 4’