Regioselective Hydroxylation of Flavonoids by Transition-Metal-Catalyzed C–H Bond Oxidation
作者:Shu-Min Lu、Chao Chen、Chang Liu、Rudong Liu、Jia-Hua Chen、Zhongchao Zhang、Zhen Yang
DOI:10.1021/acs.orglett.3c00517
日期:——
Regioselective synthesis of 5,6,7-trihydroxyl and 5,7,8-trihydroxyl flavones has been achieved via a transition-metal-catalyzed C–H oxidation as the key step using naturally enriched 5,7-dihydroxyl flavone. The developed chemistry was applied to the synthesis of the naturally occurring and biologically active flavonoids wogonin (2), oroxylin A (3), and their glycosylated derivatives (4 and 5) as potential
5,6,7-三羟基和 5,7,8-三羟基黄酮的区域选择性合成是通过过渡金属催化的 C-H 氧化作为使用天然富集的 5,7-二羟基黄酮的关键步骤实现的。已开发的化学方法用于合成天然存在且具有生物活性的类黄酮汉黄芩素 ( 2 )、oroxylin A ( 3 ) 及其糖基化衍生物(4和5),作为潜在的肉碱棕榈酰转移酶 1 激活剂。