Regioselective synthesis of C-prenylated flavonoids via intramolecular [1,3] or [1,5] shift reaction catalyzed by acidic clays
作者:Wei Li、Liang Shu、Kexiong Liu、Qiuan Wang
DOI:10.1016/j.tetlet.2019.151138
日期:2019.10
C-prenylated flavonoids via intramolecular [1,3] or [1,5] shift reaction of 5-O-prenylflavonoids catalyzed by Florisil or Montmorillonite clays is described. Florisil catalyzes intramolecular [1,5] shift reaction of 5-O-prenylflavonoids to obtain 8-C-prenylated flavonoids exclusively, Montmorillonite K10 exhibits the superior selectivity to promote intramolecular [1,3] shift reaction to obtain 6-C-prenylated
异戊二烯侧链和二氢吡喃基骨架存在于许多天然和合成的生物活性类黄酮中。用于合成一个高效和区域选择性方法Ç -prenylated黄酮经由分子内[1,3]或[1,5]移位5-反应ö -prenylflavonoids通过硅酸镁载体或蒙脱土催化进行说明。Florisil催化5- O-异戊烯基类黄酮的分子内[1,5]转化反应,从而获得8 - C-异戊烯基化黄酮,蒙脱土K10表现出优异的选择性,可促进分子内[1,3]转化反应获得6- C。-异戊二烯黄酮与Florisil和Montmorillonite KSF的比较。该方法提供了在温和条件下使用市售和廉价的催化剂以高收率选择性选择性地生物合成重要的生物学上重要的C-戊烯基黄酮类化合物的实用方法。