作者:Masao Tsukayama、Kunihiro Fujimoto、Tokunaru Horie、Yoshiro Yamashita、Mitsuo Masumura、Mitsuru Nakayama
DOI:10.1246/cl.1982.675
日期:1982.5.5
2′,4′,5,7-Tetrahydroxyisoflavone was partially benzoylated with benzoyl chloride to give 7-benzoyloxy-2′,4′,5-trihydroxyisoflavone. The condensation of 7-benzoyloxyisoflavone with 2-methyl-3-buten-2-ol, followed by the hydrolysis of the resultant 3′-(3-methyl-2-butenyl)isoflavone afforded licoisoflavone A. Its 5′-(3-methyl-2-butenyl) isomer was also synthesized from 5-benzoyloxyisoflavone.
用
苯甲酰氯对 2′,4′,5,7-四羟基异
黄酮进行部分
苯甲酰化,得到 7-
苯甲酰
氧基-2′,4′,5-
三羟基异
黄酮。将 7-
苯甲酰
氧基异
黄酮与
2-甲基-3-丁烯-2-醇缩合,然后
水解生成 3′-(3-
甲基-
2-丁烯基)异
黄酮,得到地衣异
黄酮 A。