Structure activity relationship studies of natural product chemokine receptor CCR5 antagonist anibamine toward the development of novel anti prostate cancer agents
作者:Feng Zhang、Christopher K. Arnatt、Kendra M. Haney、Harrison C. Fang、John E. Bajacan、Amanda C. Richardson、Joy L. Ware、Yan Zhang
DOI:10.1016/j.ejmech.2012.07.049
日期:2012.9
Anibamine, a novel pyridine quaternary alkaloid isolated fromAniba sp., was found to effectively compete with 125I-gp120 in binding to the chemokine receptor CCR5, with an IC50 = 1 μM. Anibamine is the first natural product reported as a CCR5 antagonist, and thus provides a novel structural skeleton unique from other lead compounds that have generally been identified from high-throughput screening efforts
Anibamine and Its Analogues: Potent Antiplasmodial Agents from <i>Aniba citrifolia</i>
作者:Yongle Du、Ana Lisa Valenciano、Yumin Dai、Yi Zheng、Feng Zhang、Yan Zhang、Jason Clement、Michael Goetz、David G. I. Kingston、Maria B. Cassera
DOI:10.1021/acs.jnatprod.9b00724
日期:2020.3.27
In our continuing search for novel natural products with antiplasmodial activity, an extract of Aniba citrifolia was found to have good activity, with an IC50 value less than 1.25 μg/mL. After bioassay-directed fractionation, the known indolizinium alkaloid anibamine (1) and the new indolizinium alkaloid anibamine B (2) were isolated as the major bioactive constituents, with antiplasmodial IC50 values
在我们不断寻找具有抗疟原虫活性的新型天然产物的过程中,发现柑橘属植物提取物具有良好的活性,其 IC 50值小于 1.25 μg/mL。经过生物测定定向分离,已知的茚茚生物碱anibamine ( 1 )和新的茚茚生物碱anibamine B( 2 )作为主要生物活性成分被分离出来,抗疟原虫的IC 50值分别为0.170和0.244 μM,对耐药Dd2菌株恶性疟原虫。新香豆素类生物素 A ( 3 )、新的降木脂素 anibignan A ( 5 ) 和六种已知的新木脂素( 7 – 12 )) 也得到了。所有分离出的化合物的结构均基于 1D 和 2D NMR 光谱和质谱数据的分析确定,并从其 ECD 谱中确定了苯丙胺 A ( 5 )的绝对构型。对 28 个阿尼巴胺类似物 ( 13 – 40 )库的评估表明,带四元电荷的类似物的 IC 50值低至 58 nM,而不带电荷的类似物则没有活性或活性显
Efficient synthesis of differently substituted triarylpyridines with the Suzuki-Miyaura cross-coupling reaction
作者:Dariusz Adam Błachut、Joanna Szawkało、Piotr Pomarański、Piotr Roszkowski、Jan K. Maurin、Zbigniew Czarnocki
DOI:10.3998/ark.5550190.p009.772
日期:——
A library of differently substituted 3,4,5-triaryl-2,6-dimethylpyridines and 2,3,5-triaryl-4,6-dimethylpyridines were synthesized and characterized using the Suzuki-Miyaura cross-couplingreaction with accordingly selected tribromodimethylpyridines and arylboronic acids. The optimized coupling conditions were found to be general for both isomeric tribromodimethylpyridines and a wide range of arylboronic
Regio-and atropselective synthesis of selected ortho-phenyl substituted arylpyridine derivatives
作者:Piotr Pomarański、Piotr Roszkowski、Jan K. Maurin、Zbigniew Czarnocki
DOI:10.1016/j.molstruc.2018.09.061
日期:2019.2
ortho-methoxy- and ortho-chloro substituted series, the complete arylation furnished stable at room temperature atropisomers of different stereochemistry. This result may be attributed to the presence of additional transition state stabilisation caused by the complexation of the palladium atom with ortho-methoxy group and this observation may be helpful in the stereoselective synthesis of analogous compounds
摘要 研究了 2,3,5-tribromo-4,6-二甲基吡啶与邻甲氧基苯基或邻氯苯基硼酸之间的 Suzuki-Miyaura 交叉偶联反应。使用有限量的硼酸导致二芳基化产物的区域选择性形成。在邻甲氧基和邻氯取代系列的情况下,完全芳基化提供了在室温下稳定的不同立体化学的阻转异构体。这一结果可能归因于钯原子与邻甲氧基络合引起的额外过渡态稳定性的存在,这一观察结果可能有助于类似化合物的立体选择性合成。所有获得的吡啶衍生物的结构均通过 NMR 光谱以及单晶 X 射线分析明确确定。
The potential role of anibamine, a natural product CCR5 antagonist, and its analogues as leads toward development of anti-ovarian cancer agents
作者:Yan Zhang、Christopher K. Arnatt、Feng Zhang、Jiannan Wang、Kendra M. Haney、Xianjun Fang
DOI:10.1016/j.bmcl.2012.05.127
日期:2012.8
Chemokines and their receptors play important roles in the development of primary tumors and their metastases. Particularly CC chemokine receptor 5 (CCR5) and its ligand CC chemokine ligand 5 (CCL5/RANTES) seem to be critical in proliferation and invasion of ovarian cancer, the leading cause of death from gynecological malignancies in the United States. Anibamine, the first natural product CCR5 antagonist, and its analogues were examined for their effects on proliferation of the OVCAR-3 ovarian cancer cells in order to validate their candidacy as leads to develop novel anti-ovarian cancer agents. Acting as CCR5 antagonists, anibamine and its analogues significantly suppressed CCL5-induced intracellular Ca2+ flux. The compounds also inhibited the proliferation of OVCAR-3 at micromolar to submicromolar range. Moreover, anibamine and several analogues did not show significant cytotoxicity in NIH 3T3 cells at concentrations up to 20 mu M. Based on these results, anibamine and one of its synthetic analogues were defined as potential leads to develop novel agents against ovarian cancer. Published by Elsevier Ltd.