Utilization of the inherent nucleophile for regioselective O-acylation of polyphenols via an intermolecular cooperative transesterification
作者:Jingchao Liu、Junjie Fu、Wenlong Li、Yu Zou、Zhangjian Huang、Jinyi Xu、Sixun Peng、Yihua Zhang
DOI:10.1016/j.tet.2016.05.048
日期:2016.7
A green and efficient method for regioselective O-acylation of polyphenols has been developed. The acylation can be carried out in potassium carbonate/dimethyl sulphoxide system by utilizing the ‘inherent nucleophile’ via an intermolecular cooperative transesterification under mild condition. This method shows particular advantage in regioselective acylation of polyphenols bearing 2′,4′-dihydroxyacetophenone
已经开发了一种绿色有效的多酚区域选择性O-酰化方法。可以在温和条件下通过分子间合作酯交换利用“固有亲核试剂”,在碳酸钾/二甲亚砜体系中进行酰化反应。该方法在带有2',4'-二羟基苯乙酮部分的多酚的区域选择性酰化中显示出特别的优势,并且可以扩展为不具有该部分的多酚的单乙酸酯或多种乙酸酯的合成。与其他已报道的方法相比,该方法具有原子经济性,并且在避免使用任何金属基催化剂方面更加环保。