作者:Kai Bao、Yi Dai、Zhi-Bin Zhu、Feng-Juan Tu、Wei-Ge Zhang、Xin-Sheng Yao
DOI:10.1016/j.bmc.2010.07.062
日期:2010.9
of biphenyls, analogs of aglycone of natural product fortuneanoside E, were prepared using Suzuki–Miyaura cross-coupling and selective magnesium iodide demethylation/debenzylation, and their mushroom tyrosinase inhibitory activity was evaluated. Most of the 4-hydroxy-3,5-dimethoxyphenyl biphenyl compounds (series II, 20–36) were in general more active than 3,4,5-trimethoxyphenyl biphenyl compounds (series
使用铃木-Miyaura交叉偶联和选择性碘化镁去甲基/去苄基作用,制备了两个新的联苯系列,即天然产物苦瓜子苷E糖苷配基类似物,并评估了其对蘑菇酪氨酸酶的抑制活性。通常,大多数4-羟基-3,5-二甲氧基苯基联苯化合物(II系列,20–36)比3,4,5-三甲氧基苯基联苯基化合物(I,1-19)更具活性。结构-活性关系研究表明,单糖取代基(例如葡萄糖)不是必需的,并且4-羟基-3,5-二甲氧基苯基部分的存在对于抑制活性至关重要。在合成的化合物中,化合物21(IC 50 = 0.02 mM)是活性最高的一种,其活性比金银花皂苷E(IC 50 = 0.14 mM)高7倍,比熊果苷(IC 50 = 0.21 mM)高10倍,被称为有效的酪氨酸酶抑制剂。通过Lineweaver-Burk图分析的抑制动力学表明,化合物21是竞争性抑制剂(K i = 0.015 mM)。