Synthesis and antibacterial activity of new lactone 1,4-dihydroquinoline derivatives
作者:Rosangela S. Laurentiz、Willian P. Gomes、Ana P. R. Pissurno、Fernanda A. Santos、Vinicius Cristian O. Santos、Carlos H. G. Martins
DOI:10.1007/s00044-017-2129-x
日期:2018.4
and 4ci displayed moderate antibacterialactivity against P. gingivalis. 4bi was the most active compound against the three strains of Mycobacterium. Based on structure–activity relationship studies, we observed that the presence of a nitro group on the benzylic ring and a methylenedioxy group on the dihydroquinoline ring enhanced the antibacterialactivity of the derivatives.
在这项工作中,有效地合成了一系列内酯1,4-二氢喹啉衍生物4并通过1 H和13 C NMR进行了表征。评价了所合成的化合物对细菌菌株牙龈卟啉单胞菌,黑线菌,血链球菌和血链球菌以及对结核分枝杆菌,鸟分枝杆菌和堪萨斯分枝杆菌的体外抗菌活性。结果表明,所评价的化合物对革兰氏阴性细菌更具活性。化合物4ba,4bb,4BG,4bi,40亿,4CH,和4 Cl显示温和的抗菌活性对牙龈卟啉菌。4bi是对三种分枝杆菌最具活性的化合物。根据结构-活性关系研究,我们观察到苄基环上存在硝基,二氢喹啉环上存在亚甲基二氧基,可以增强衍生物的抗菌活性。
Insecticidal heterolignans—Tubuline polymerization inhibitors with activity against chewing pests
Starting from natural product podophyllotoxin 1 substituted heterolignans were identified with promising insecticidal in vivo activity. The impact of substitution in each segment of the core structure was investigated in a detailed SAR study, and variation of substituents in both aromatic moieties afforded derivatives 5 and 43 with broad insecticidal activity against lepidopteran and coleopteran species. In vitro measurements supported by modeling studies indicate that heterolignans 3-134 act as tubuline polymerization inhibitors interacting with the colchicine-binding site. Insect specific structure-activity effects were observed showing that the insecticidal SAR described herein differs from reported cytotoxicity studies. (C) 2009 Elsevier Ltd. All rights reserved.
4-Aza-2,3-dehydro-4-deoxypodophyllotoxin analogues 3a-n were synthesized through quinolines 2a-n. Comparison of their cytotoxicity against P-388 leukemia cells revealed that the steric effects of the ring B substituents on the activity are greater than the electronic effects, while the presence of a methoxy group on the ring E is not essential to exhibit potent cytotoxicity. Analogues 3a and 3b proved to be more than twice as cytotoxic as natural podophyllotoxin (1). (C) 2000 Elsevier Science Ltd. All rights reserved.
US6548515B1
申请人:——
公开号:US6548515B1
公开(公告)日:2003-04-15
Polyalkoxybenzenes from Plants. 5. Parsley Seed Extract in Synthesis of Azapodophyllotoxins Featuring Strong Tubulin Destabilizing Activity in the Sea Urchin Embryo and Cell Culture Assays
作者:Marina N. Semenova、Alex S. Kiselyov、Dmitry V. Tsyganov、Leonid D. Konyushkin、Sergei I. Firgang、Roman V. Semenov、Oleg R. Malyshev、Mikhail M. Raihstat、Fabian Fuchs、Anne Stielow、Margareta Lantow、Alex A. Philchenkov、Michael P. Zavelevich、Nikolay S. Zefirov、Sergei A. Kuznetsov、Victor V. Semenov
DOI:10.1021/jm200737s
日期:2011.10.27
targeted molecules were evaluated in vivo in a phenotypic seaurchinembryo assay for antimitotic and tubulin destabilizing activity. The most active compounds identified by the in vivo seaurchinembryo assay featured myristicin-derived ring E (4e, 6e, and 8e). These molecules were determined to be more potent than podophyllotoxin. Cytotoxic effects of selected molecules were further confirmed and evaluated