Efficient Synthesis of Arylated Flavones by Site-Selective Suzuki-Miyaura Cross-Coupling Reactions of the Bis(triflate) of 5,7- and 7,8-Dihydroxyflavone
作者:Nadi Eleya、Imran Malik、Sebastian Reimann、Kai Wittler、Martin Hein、Tamás Patonay、Alexander Villinger、Ralf Ludwig、Peter Langer
DOI:10.1002/ejoc.201101491
日期:2012.3
Suzuki–Miyaura reactions of the bis(triflate) of 5,7- and 7,8-dihydroxyflavone proceed with very good site selectivity in favor of position 7 and allow the synthesis of various arylated flavones. The reaction of 5,7-dihydroxyflavone with one equivalent of triflic anhydride also proceeds with very good site selectivity in favor of position 7. The subsequent Suzuki–Miyaura reaction of the product allows
5,7- 和 7,8- 二羟基黄酮的双(三氟甲磺酸酯)的 Suzuki-Miyaura 反应具有非常好的位点选择性,有利于 7 位,并允许合成各种芳基化黄酮。5,7-二羟基黄酮与一当量三氟甲磺酸酐的反应也以非常好的位点选择性进行,有利于位置 7。随后产物的 Suzuki-Miyaura 反应允许合成 7-芳基-5-羟基黄酮。基于 DFT 计算讨论区域选择性。