10601-19-1Relevant academic research and scientific papers
Synthesis and anti-tuberculosis activity of the marine natural product caulerpin and its analogues
Canche Chay, Cristina I.,Cansino, Rocio Gomez,Espitia Pinzon, Clara I.,Torres-Ochoa, Ruben O.,Martinez, Roberto
, p. 1757 - 1772 (2014)
Caulerpin (1a), a bis-indole alkaloid from the marine algal Caulerpa sp., was synthesized in three reaction steps with an overall yield of 11%. The caulerpin analogues (1b-1g) were prepared using the same synthetic pathway with overall yields between 3% and 8%. The key reaction involved a radical oxidative aromatic substitution involving xanthate (3) and 3-formylindole compounds (4a-4g). All bis-indole compounds synthesized were evaluated against the Mycobacterium tuberculosis strain H37Rv, and 1a was found to display excellent activity (IC50 0.24 μM).
A facile approach to tryptophan derivatives for the total synthesis of argyrin analogues
Chen, Chou-Hsiung,Genapathy, Sivaneswary,Fischer, Peter M.,Chan, Weng C.
, p. 9764 - 9768 (2014)
A facile route has been established for the synthesis of indole-substituted (S)-tryptophans from corresponding indoles, which utilizes a chiral auxiliary-facilitated Strecker amino acid synthesis strategy. The chiral auxiliary reagents evaluated were (S)-methylbenzylamine and related derivatives. To illustrate the robustness of the method, eight optically pure (S)-tryptophan analogues were synthesized, which were subsequently used for the convergent synthesis of a potent antibacterial agent, argyrin A and its analogues.
Intramolecular Diels-Alder reaction for the synthesis of tetracyclic carbazoles and isocanthines
Naik, Prajakta N.,Khan, Ayesha,Kusurkar, Radhika S.
, p. 10733 - 10738 (2013)
One pot intramolecular Diels-Alder reaction has been efficiently used as a new route for the synthesis of four tetracyclic carbazoles and four isocanthine analogues where a dialdehyde is utilised as a common intermediate for both the scaffolds. Biological activity was evaluated for some molecules, which demonstrated moderate activity against HeLa cervical cancer cell lines.
Mapping the melatonin receptor. 7. Subtype selective ligands based on β-substituted N-acyl-5-methoxytryptamines and β-Substituted N-acyl-5-methoxy-1-methyltryptamines
Tsotinis, Andrew,Vlachou, Margarita,Papahatjis, Demetris P.,Calogeropoulou, Theodora,Nikas, Spyros P.,Garratt, Peter J.,Piccio, Vincent,Vonhoff, Stefan,Davidson, Kathryn,Teh, Muy-Teck,Sugden, David
, p. 3509 - 3519 (2006)
A series of β-substituted and β,β-disubstituted N-acyl 5-methoxy-1-methyltryptamines and 5-methoxytryptamines have been prepared as melatonin analogues to investigate the nature of the binding site of the melatonin receptor. The affinity of analogues was determined in a radioligand binding assay using cloned human MT1 and MT2 receptor subtypes expressed in NIH 3T3 cells. Agonist and antagonist potency of all analogues was measured using the pigment aggregation response of a clonal line of Xenopus laevis melanophores, β-Methylmelatonin (17a) and β,β-dimethylmelatonin (17b), though showing a slight decrease in binding at human receptors, show an increase in potency on Xenopus, N-Butanoyl 5-methoxy-1-methyl-β,β-trimethylenetryptamine (12c) is an antagonist at human MT1 receptors but an agonist at MT2, while N-butanoyl 5-methoxy-1-methyl-β,β-tetramethylenetryptamine (13c) is an antagonist at MT1 but had no action at MT2 and is one of the first examples of an MT1 selective antagonist.
Synthesis of polycyclic spirooxindoles via an asymmetric catalytic one-pot stepwise Aldol/chloroetherification/aromatization procedure
Jiang, Yan,Yu, Shuo-Wen,Yang, Yi,Liu, Ying-Le,Xu, Xiao-Ying,Zhang, Xiao-Mei,Yuan, Wei-Cheng
, p. 6647 - 6651 (2018)
A general method for the synthesis of chiral pentacyclic spirooxindoles containing a tetrahydropyrano[2,3-b]indole scaffold through a one-pot stepwise sequence from 3-(3-indolomethyl)oxindole, paraformaldehyde and NCS is reported. Furthermore, the pentacyclic spirooxindoles could be transformed to bispirooxindole and other structurally diverse spirocyclic oxindoles.
Synthesis, biological evaluation and mechanism study of chalcone analogues as novel anti-cancer agents
Chen, Jie,Yan, Jun,Hu, Jinhui,Pang, Yanqing,Huang, Ling,Li, Xingshu
, p. 68128 - 68135 (2015)
A series of novel chalcone analogues were designed, synthesized and evaluated as anticancer agents. The results of antiproliferative activity tests showed that most of the analogues exhibited moderate to very good antiproliferative activities with GI50 values in the micromol to sub-micromol range. Especially compound 10a gave 0.026 μM to 0.035 μM GI50 for five cancer cell lines. The mechanistic studies including tubulin polymerization inhibition, disruption of microtubule dynamics and cell cycle arrest assay demonstrated that compound 10a could effectively inhibit in vitro cellular tubulin polymerization, interfere with the mitosis, resulting in a prolonged G2/M cell cycle arrest and ultimately lead to cell apoptosis of cancer cells. Taken together, these results suggested that 10a may became a promising lead compound for development of new anticancer drugs.
Design, synthesis and biological evaluation of pyridine-chalcone derivatives as novel microtubule-destabilizing agents
Xu, Feijie,Li, Wenlong,Shuai, Wen,Yang, Limei,Bi, Yi,Ma, Cong,Yao, Hequan,Xu, Shengtao,Zhu, Zheying,Xu, Jinyi
, p. 1 - 14 (2019)
Further optimization of the trimethoxyphenyl scaffold of parent chalcone compound (2a) by introducing a pyridine ring afforded a series of novel pyridine-chalcone derivatives as potential anti-tubulin agents. All the target compounds were evaluated for their antiproliferative activities. Among them, representative compound 16f exhibited the most potent activity with the IC50 values ranging from 0.023 to 0.045 μM against a panel of cancer cell lines. Further mechanism study results demonstrated that compound 16f effectively inhibited the microtubule polymerization by binding to the colchicine site of tubulin. Moreover, cellular mechanism studies disclosed that 16f caused G2/M phase arrest, induced cell apoptosis and disrupted the intracellular microtubule network. Also, 16f reduced the cell migration and disrupted the capillary-like tube formation of human umbilical vein endothelial cells (HUVECs). Importantly, 16f significantly inhibited tumor growth in H22 xenograft models without apparent toxicity, which was stronger than the reference compound CA-4, indicating that it is worthy to investigate 16f as a potent microtubule-destabilizing agent for cancer therapy.
Design, synthesis, and biological evaluation of NAD(P)H: Quinone oxidoreductase (NQO1)-targeted oridonin prodrugs possessing indolequinone moiety for hypoxia-selective activation
Xu, Shengtao,Yao, Hong,Pei, Lingling,Hu, Mei,Li, Dahong,Qiu, Yangyi,Wang, Guangyu,Wu, Liang,Yao, Hequan,Zhu, Zheying,Xu, Jinyi
, p. 310 - 321 (2017)
The enzyme NQO1 is a potential target for selective cancer therapy due to its overexpression in certain hypoxic tumors. A series of prodrugs possessing a variety of cytotoxic diterpenoids (oridonin and its analogues) as the leaving groups activated by NQO1 were synthesized by functionalization of 3-(hydroxymethyl)indolequinone, which is a good substrate of NQO1. The target compounds (29a-m) exhibited relatively higher antiproliferative activities against NQO1-rich human colon carcinoma cells (HT-29) and human lung carcinoma (A549) cells (IC50?=?0.263–2.904?μM), while NQO1-defficient lung adenosquamous carcinoma cells (H596) were less sensitive to these compounds, among which, compound 29h exhibited the most potent antiproliferative activity against both A549 and HT-29?cells, with IC50 values of 0.386 and 0.263?μM, respectively. Further HPLC and docking studies demonstrated that 29h is a good substrate of NQO1. Moreover, the investigation of anticancer mechanism showed that the representative compound 29h affected cell cycle and induced NQO1 dependent apoptosis through an oxidative stress triggered mitochondria-related pathway in A549?cells. Besides, the antitumor activity of 29h was also verified in a liver cancer xenograft mouse model. Biological evaluation of these compounds concludes that there is a strong correlation between NQO1 enzyme and induction of cancer cell death. Thus, this suggests that some of the target compounds activated by NQO1 are novel prodrug candidates potential for selective anticancer therapy.
Access to Polycyclic Sulfonyl Indolines via Fe(II)-Catalyzed or UV-Driven Formal [2 + 2 + 1] Cyclization Reactions of N-((1H-indol-3-yl)methyl)propiolamides with NaHSO3
Lu, Lin,Luo, Chenguang,Peng, Hui,Jiang, Huanfeng,Lei, Ming,Yin, Biaolin
, p. 2602 - 2605 (2019)
A variety of structurally novel polycyclic sulfonyl indolines have been synthesized via FeCl2-catalyzed or UV-driven intramolecular formal [2 + 2 + 1] dearomatizing cyclization reactions of N-(1H-indol-3-yl)methyl)propiolamides with NaHSO3 in an aqueous medium. The reactions involve the formation of one C-C bond and two C-S bonds in a single step.
Synthesis, anticancer activities and molecular modeling studies of novel indole retinoid derivatives
Selen Gurkan-Alp,Mumcuoglu, Mine,Andac, Cenk A.,Dayanc, Emre,Cetin-Atalay, Rengul,Buyukbingol, Erdem
, p. 346 - 354 (2012)
In this study, novel (E)-3-(5-substituted-1H-indol-3-yl)-1-(5,5,8,8- tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)prop-2-en-1-one (5(a-e)) derivatives were synthesized and their anticancer effects were determined in vitro. Novel indole retinoid compounds except 5e have anti-proliferative capacity in liver, breast and colon cancer cell lines. This anti-proliferative effect was further analyzed in breast cancer cell line panel by using the most potent compound 5a. It was determined that 5a can inhibit proliferation at very low IC50 concentrations in all of the breast cancer cell lines. Here, we present some evidence on apoptotic termination of cancer cell proliferation which may be primarily driven by the inhibition of RXRα and, to a lesser extent, RXRγ.
