- Flavonoid glycosides with a triazole moiety for marine antifouling applications: Synthesis and biological activity evaluation
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Over the last decades, antifouling coatings containing biocidal compounds as active ingre-dients were used to prevent biofouling, and eco-friendly alternatives are needed. Previous research from our group showed that polymethoxylated chalcones and glycosy
- Pereira, Daniela,Gon?alves, Catarina,Martins, Beatriz T.,Palmeira, Andreia,Vasconcelos, Vitor,Pinto, Madalena,Almeida, Joana R.,Correia-Da-silva, Marta,Cidade, Honorina
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- Synthesis of butein analogues and their anti-proliferative activity against gefitinib-resistant non-small cell lung cancer (NSCLC) through Hsp90 inhibition
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Non-small cell lung cancer (NSCLC) is the most common type of lung cancer representing 85% of lung cancer patients. Despite several EGFR-targeted drugs have been developed in the treatment of NSCLC, the clinical efficacy of these EGFR-targeted therapies i
- Seo, Young Ho,Jeong, Ju Hui
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p. 1294 - 1298
(2014/06/09)
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- Reactivity assessment of chalcones by a kinetic thiol assay
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The electrophilic nature of chalcones (1,3-diphenylprop-2-en-1-ones) and many other α,β-unsaturated carbonyl compounds is crucial for their biological activity, which is often based on thiol-mediated regulation processes. To better predict their biological activity a simple screening assay for the assessment of the second-order rate constants (k2) in thia-Michael additions was developed. Hence, a clear structure-activity relationship of 16 differentially decorated hydroxy-alkoxychalcones upon addition of cysteamine could be established. Moreover, amongst other naturally occurring α,β-unsaturated carbonyl compounds k2 values for curcumin and cinnamaldehyde were gained while cinnamic acids or esters gave no or very slow reactions.
- Amslinger, Sabine,Al-Rifai, Nafisah,Winter, Katrin,W?rmann, Kilian,Scholz, Rebekka,Baumeister, Paul,Wild, Martin
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p. 549 - 554
(2013/03/13)
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- Synthesis, docking studies and antioxidant activity of some chalcone and aurone derivatives
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Chalcones and aurones are found to possess high antioxidant activity. They are known to inhibit tyrosinase enzyme involved in synthesis of melanin. A series of substituted chalcones and aurones have been synthesized and tested for their antioxidant activi
- Narsinghani, Tamanna,Sharma, Mukesh C.,Bhargav, Sakshi
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p. 4059 - 4068
(2013/09/02)
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- Synthesis and insight into the structure-activity relationships of chalcones as antimalarial agents
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Licochalcone A (I), isolated from the roots of Chinese licorice, is the most promising antimalarial compound reported so far. In continuation of our drug discovery program, we isolated two similar chalcones, medicagenin (II) and munchiwarin (III), from Crotalaria medicagenia, which exhibited antimalarial activity against Plasmodium falciparum. A library of 88 chalcones were synthesized and evaluated for their in vitro antimalarial activity. Among these, 67, 68, 74, 77, and 78 exhibited good in vitro antimalarial activity against P. falciparum strains 3D7 and K1 with low cytotoxicity. These chalcones also showed reduction in parasitemia and increased survival time of Swiss mice infected with Plasmodium yoelii (strain N-67). Pharmacokinetic studies indicated that low oral bioavailability due to poor ADME properties. Molecular docking studies revealed the binding orientation of these inhibitors in active sites of falcipain-2 (FP-2) enzyme. Compounds 67, 68, and 78 showed modest inhibitory activity against the major hemoglobin degrading cysteine protease FP-2.
- Tadigoppula, Narender,Korthikunta, Venkateswarlu,Gupta, Shweta,Kancharla, Papireddy,Khaliq, Tanvir,Soni, Awakash,Srivastava, Rajeev Kumar,Srivastava, Kumkum,Puri, Sunil Kumar,Raju, Kanumuri Siva Rama,Wahajuddin,Sijwali, Puran Singh,Kumar, Vikash,Mohammad, Imran Siddiqi
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- 7-Hydroxy-benzopyran-4-one derivatives: A novel pharmacophore of peroxisome proliferator-activated receptor α and -γ (PPARα and γ) dual agonists
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Design, synthesis, and in vitro bioevaluation of a new class of potential dual PPARα and γ agonists discovered through a structure-driven design paradigm are described. The 7-hydroxy-benzopyran-4-one moiety (includes flavones, flavanones, and isoflavones) is the key pharmacophore of these novel molecules, exhibiting similarity to the core structure of both fibrates and thiazolidinediones. New lead PPAR ligands were identified from "natraceuticals" and synthetic analogues. In total, 77 molecules, including chalcones, flavones, flavanones, isoflavones, and pyrazole derivatives, were screened and structure-activity relationship studies of the dual agonists undertaken. Compounds 68, 70, 72, and 76 were identified as novel and potent dual PPARα and γ agonists. These novel molecules may have the potential to be the future leads in PPAR-related disorders, including type II diabetes mellitus and metabolic syndrome. 2009 American Chemical Society.
- Matin, Azadeh,Gavande, Navnath,Kim, Moon S.,Yang, Nancy X.,Salam, Noeris K.,Hanrahan, Jane R.,Roubin, Rebecca H.,Hibbs, David E.
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experimental part
p. 6835 - 6850
(2010/04/04)
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