An Efficient Synthesis of (±)-Epigallocatechin Gallate by Reductive Intramolecular Etherification
作者:Takashi Takahashi、Makoto Kitade、Yoshiaki Ohno、Hiroshi Tanaka
DOI:10.1055/s-2006-950283
日期:2006.10
The synthesis of (±)-epigallocatechin gallate by direct cyclization to the cis-3-acyloxy-2-arylbenzopyranee is described. α-Acyloxylketones, possessing a 2-hydroxylphenyl group at the β-position, underwent intramolecular reductive etherification to give cis-3-acyloxy-2-arylbenzopyran due to neighboring group participation of the acyloxyl group at the α-position. Using this method, we accomplished the
描述了 (±)-表没食子儿茶素没食子酸酯通过直接环化成 cis-3-acyloxy-2-arylbenzopyranee 的合成。α-酰氧基酮在 β 位具有 2-羟基苯基,由于 α 位酰氧基的相邻基团参与,经过分子内还原醚化得到顺式-3-酰氧基-2-芳基苯并吡喃。使用这种方法,我们完成了(±)-表没食子儿茶素没食子酸酯的立体选择性合成。