Bi(OTf)3-catalysed prenylation of electron-rich aryl ethers and phenols with isoprene: a direct route to prenylated derivatives
作者:Katie E. Judd、Lorenzo Caggiano
DOI:10.1039/c1ob05365e
日期:——
Electron-rich aryl ethers and phenols react with isoprene (2-methylbuta-1,3-diene) in the presence of catalytic Bi(OTf)3 at 40 °C to afford the corresponding prenylated or 2,2-dimethylchroman products, respectively, in moderate to good yields. This transformation offers a convenient and expedient entry to prenylated derivatives of electron-rich aromatics that often display enhanced biological activities
富含电子的芳基醚和酚与 异戊二烯 (2-甲基丁-1,3-二烯)在40°C下存在催化Bi(OTf)3的情况下提供相应的烯丙基化或2,2-二甲基苯并吡喃产品分别以中等到良好的产量。这种转变为通常显示出增强的生物活性的富含电子的芳族化合物的烯丙基化衍生物的进入提供了方便和便利的途径。该方法已用于生物活性天然产物和相关化合物的有效合成中。