Many arylnaphthalene lignans show biological activity and although few of them contain stereogenic centers, they may nevertheless be chiral if there is hindered rotation about the aryl-naphthalene bond. A relatively high barrier to rotation may give rise to separable rotational enantiomers (atropisomers) which might have quite different pharmacological properties. In order to investigate this possibility we have synthesized the natural products justicidin A, justicidin B, retro-helioxanthin, retro-justicidin B, and helioxanthin as well as four other arylnaphthalenes lignan analogs. We have studied the aryl-naphthalene rotational barrier in these compounds by dynamic NMR and HPLC and find barriers to rotation ranging from 16.9 to 21.5 kcal/mol. This translates to half-lives for individual atropisomers of less than 10 min at room temperature. The experimentally found barriers are compared to those obtained from molecular orbital calculations.
Synthesis and bioevaluation of novel arylnaphthalene lignans as anticancer agents
作者:Yu Zhao、Jie Hui、Li Zhu
DOI:10.1007/s00044-012-0245-1
日期:2013.5
Novel arylnaphthalenelignans were synthesized and their structures were established by 1H NMR, 13C NMR, and HRMS. These compounds were evaluated for their in vitro cytotoxicity against cancer cell lines by MTT assay. Compound 5d possessed the highest cytotoxicity against KB cells. Apoptosis of KB cells treated with 5d was observed by acridine orange and ethidium bromide double staining assay. Western
合成了新型芳基萘木酚素,并通过1 H NMR,13 C NMR和HRMS建立了结构。通过MTT测定法评估这些化合物对癌细胞系的体外细胞毒性。化合物5d对KB细胞具有最高的细胞毒性。通过a啶橙和溴化乙锭双重染色法观察5d处理的KB细胞的凋亡。Western印迹分析显示5d通过线粒体途径诱导细胞凋亡,伴随Bax表达增加和Bcl-2表达减少。
[EN] COMPOUNDS FOR THE INHIBITION OF UNREGULATED CELL GROWTH<br/>[FR] COMPOSÉS POUR L'INHIBITION DE LA CROISSANCE CELLULAIRE NON RÉGULÉE
申请人:GODAVARI BIOREFINERIES LTD
公开号:WO2020129082A1
公开(公告)日:2020-06-25
The present invention discloses compounds for inhibition of uncontrolled cell proliferation particularly cancer stem cells. Particularly, the invention relates to compounds of Formula I to XXII for the treatment of cancer.
The present invention relates to a process for preparing compound of formula (I) that is Cleistanthin A. The process comprises the steps of reacting compound of formula (II) with compound of formula (III) in the presence of a first solvent, quarternary ammonium salt and first alkali to form compound of formula (IV). The compound of formula (IV) is further treated with a second solvent and a second alkali to form compound of formula (I). The present invention also relates to the preparation of salt of compound of formula (IV) that is Cleistanthin A acetate.
The present disclosure relates to patentiflorin A analogs that are useful as antivirals, such as anti-HIV, anti-coronaviral, anti-Ebola viral, and anti-influenza viral agents and methods of use thereof.
Synthesis and antiproliferative activity of derivatives of the phyllanthusmin class of arylnaphthalene lignan lactones
作者:John L. Woodard、Andrew C. Huntsman、Pratiq A. Patel、Hee-Byung Chai、Ragu Kanagasabai、Soumendrakrishna Karmahapatra、Alexandria N. Young、Yulin Ren、Malcolm S. Cole、Denisse Herrera、Jack C. Yalowich、A. Douglas Kinghorn、Joanna E. Burdette、James R. Fuchs
DOI:10.1016/j.bmc.2018.03.033
日期:2018.5
A series of arylnaphthalenelignan lactones based on the structure of the phyllanthusmins, a class of potent natural products possessing diphyllin as the aglycone, has been synthesized and screened for activity against multiple cancer cell lines. SAR exploration was performed on both the carbohydrate and lactone moieties of this structural class. These studies have revealed the importance of functionalization
已经合成了一系列基于 phyllanthusmins 结构的芳基萘木脂素内酯,这是一类以二叶素为苷元的有效天然产物,已被合成并筛选出对多种癌细胞系的活性。对这种结构类别的碳水化合物和内酯部分进行了 SAR 探索。这些研究揭示了用乙酰化和甲基化类似物对碳水化合物羟基进行官能化的重要性,这些类似物显示出相对于未取代糖部分的效力增加。此外,已经通过内酯环的还原和选择性再氧化证明了对 C 环内酯的存在和位置的要求。本研究中最有效的化合物显示出 IC 50在 HT-29 测定中的值为 18 nM,其他几个值在 50 到 200 nM 之间。为了阐明它们的潜在作用机制,根据先前关于结构相似化合物的报告,检查了最有效化合物的 DNA 拓扑异构酶 IIa 抑制活性,但似乎对它们的抗增殖作用没有显着贡献。