Synthesis of (+)-Varitriol Analogues via Novel and Versatile Building Blocks Based on Julia Olefination
作者:Annamalai Senthilmurugan、Indrapal Singh Aidhen
DOI:10.1002/ejoc.200901012
日期:2010.1
The synthesis of (+)-varitriol (1) analogues was achieved through the use of Julia olefination. The potential anticancer properties of 1 coupled with our interest in developing building blocks that enable olefin formation under the Julia protocol constitute the basis of our research project. Efforts are aimed at the synthesis of building blocks 2 and 3 and to explore their use towards the synthesis
(+)-varitriol (1) 类似物的合成是通过使用 Julia 烯化实现的。1 的潜在抗癌特性加上我们对开发能够在 Julia 协议下形成烯烃的构建模块的兴趣构成了我们研究项目的基础。努力旨在合成构件 2 和 3,并探索它们在合成 (+)-varitriol 类似物方面的用途。在此,我们想展示构建块 3 的合成及其与各种取代的芳族、杂环和碳水化合物衍生的醛反应以中等至良好收率生成烯烃 6 的能力,其中 E 作为主要异构体。2与(呋喃糖苷部分)醛5k的成功偶联,
Convenient Synthesis of 3-Glycosylated Isocoumarins
作者:Kasireddy Sudarshan、Indrapal Singh Aidhen
DOI:10.1002/ejoc.201601264
日期:2017.1.3
A new route for the synthesis of 3-substituted and 8-hydroxy-3-substituted isocoumarins has been developed by using modified Julia olefination for initial C-C bond formation between aldehydes and benzylic-sulfones. Palladium-catalyzed Meinwald rearrangement was used as a key step for the obtainment of ketone intermediates, which on base promoted intramolecular cyclization afforded the desired isocoumarins
通过使用改良的 Julia 烯化在醛和苄基砜之间形成初始 CC 键,开发了一种合成 3-取代和 8-羟基-3-取代异香豆素的新途径。钯催化的 Meinwald 重排被用作获得酮中间体的关键步骤,其在基础上促进了分子内环化,得到了所需的异香豆素。所开发的方法首次为迄今为止未知的 3- 糖基异香豆素和特别是其中葡糖基部分连接到异香豆素骨架的吡喃酮环的 3- 糖基异香豆素铺平了道路。