Regioselective route for arylnaphthalene lactones: convenient synthesis of taiwanin C, justicidin E, and daurinol
作者:Ju-Eun Park、Juyeun Lee、Seung-Yong Seo、Dongyun Shin
DOI:10.1016/j.tetlet.2013.12.014
日期:2014.1
selectivity. Herein, we report a convenient and regioselective synthesis method in which the intramolecular Diels–Alder reaction of an arylalkene–arylalkyne and subsequent DDQ oxidation was used for Type I and Type II arylnaphthalene lactones, respectively. We demonstrated the synthesis of three lignans, taiwanin C (Type I), justicidin E (Type II), and daurinol (Type I and anti-cancer activity).
芳基萘内酯是可以从多种植物中分离得到的天然产物,并具有重要的生物学活性,包括细胞毒性,抗微生物剂,利尿剂和离子通道阻断作用。先前的3-芳基丙-2-炔基3-芳基丙酸酯的分子内Diels-Alder反应的缺点是无法选择性地生成两个芳基萘内酯的区域异构体。在这里,我们报告了一种方便且区域选择性的合成方法,其中芳基烯烃-芳基炔烃的分子内Diels-Alder反应和随后的DDQ氧化分别用于I型和II型芳基萘内酯。我们证明了三种木脂素的合成:黄花木素C(I型),木豆素E(II型)和柔红醇(I型和抗癌活性)。