Multi-functionalization of gallic acid towards improved synthesis of α- and β-DDB
作者:Ashraful Alam、Yutaka Takaguchi、Hideyuki Ito、Takashi Yoshida、Sadao Tsuboi
DOI:10.1016/j.tet.2004.11.083
日期:2005.2
The synthesis of mono-, di- and trisubstituted gallic acids and their ester with similar or different groups including different acetal and ketals is described. Regioselective bromination on two ortho-positions of methyl gallate, which is very crucial for many organic syntheses, was achieved in high yield and purity. The α- and β-DDB were synthesized in high overall yield and purity from the regioselective
描述了具有相似或不同基团(包括不同的缩醛和缩酮)的单,二和三取代的没食子酸及其酯的合成。高产率和高纯度实现了对许多有机合成非常关键的在没食子酸甲酯的两个邻位上的区域选择性溴化。α-和β-DDB是由区域选择性溴代衍生物合成的,具有较高的总收率和纯度。