Synthesis of 5-subsituted flavonols via the Algar-Flynn-Oyamada (AFO) reaction: The mechanistic implication
作者:Xianyan Shen、Qiang Zhou、Wei Xiong、Wenchen Pu、Wei Zhang、Guolin Zhang、Chun Wang
DOI:10.1016/j.tet.2017.06.064
日期:2017.8
Herein, we report a synthetic method with improved selectivity for 5-substituted flavonols via the Algar-Flynn-Oyamada reaction (AFO), by using of sodium carbonate/hydrogen peroxide A series of 5-substituted flavonols was obtained with moderate to high yields. The mechanism of the AFO reaction was elucidated. LCMS analysis and in situ 1H NMR analysis indicated that the epoxide was involved in the transformation
本文中,我们报告了一种合成方法,该方法通过使用碳酸钠/过氧化氢,通过Algar-Flynn-Oyamada反应(AFO)对5-取代的黄酮醇进行了改进,具有中等至高收率的一系列5-取代的黄酮醇。阐明了AFO反应的机理。LCMS分析和原位1 H NMR分析表明,在碱性碱/过氧化物条件下,环氧化物参与了从查尔酮到黄酮醇和/或金酮的转化。