Design and Antiproliferative Activity of N-Heterocycle-Chalcone Derivatives

Antiviral activity evaluation and action mechanism of chalcone derivatives containing phenoxypyridine

In this paper, a series of phenoxypyridine-containing chalcone derivatives (L1-L28) were designed and synthesized, characterized on NMR and HRMS. Ningnanmycin (NNM) was used as a control agent. The results of the antiviral activity testing showed that the curative activity EC50 values of L1 and L4 against TMV were 140.5 and 90.7 μg/mL, respectively, which were superior to that of NNM (148.3 μg/mL). The EC50 values of 154.1, 102.6 and 140.0 μg/mL for the anti-TMV protective activities of L1, L4 and L15 were superior to that of NNM (188.2 μg/mL). The mechanism of action between L4 and NNM and tobacco mosaic virus capsid protein (TMV-CP) was preliminarily investigated. The results of microscale thermophoresis (MST) experiments showed that L4 had a strong binding affinity for TMV-CP with a dissociation constant Kd value of 0.00149 µM, which was better than that of NNM (2.73016 µM). The results of molecular docking experiments showed that L4 formed shorter hydrogen bonds with amino acid residues of TMV-CP than NNM and formed more amino acid residues than NNM, which indicated that L4 was more tightly bound to TMV-CP. This study suggested that phenoxypyridine-containing chalcone derivatives can be used as new anti-TMV drugs through further research and development.

Chalcones and Gastrointestinal Cancers: Experimental Evidence

Colorectal (CRC) and gastric cancers (GC) are the most common digestive tract cancers with a high incidence rate worldwide. The current treatment including surgery, chemotherapy or radiotherapy has several limitations such as drug toxicity, cancer recurrence or drug resistance and thus it is a great challenge to discover an effective and safe therapy for CRC and GC. In the last decade, numerous phytochemicals and their synthetic analogs have attracted attention due to their anticancer effect and low organ toxicity. Chalcones, plant-derived polyphenols, received marked attention due to their biological activities as well as for relatively easy structural manipulation and synthesis of new chalcone derivatives. In this study, we discuss the mechanisms by which chalcones in both in vitro and in vivo conditions suppress cancer cell proliferation or cancer formation.

Hybridization of Imidazole with Various Heterocycles in Targeting Cancer: A Decade's Work

Cancer is the world‘s biggest global health concern. The prevalence and mortality rates of cancer remain high despite significant progress in cancer therapy. The search for more effective, as well as less toxic treatment methods for cancer, is at the focus of current studies. Approximately 24.6 million people are suffering from cancer across the world as per the world health organization (WHO). In the year 2020, approximately 10 million deaths were reported due to cancer which has emerged as the second leading cause of mortality across the globe. Anticancer medicines have played a pivotal role in the medication of different types of cancers; however, they are associated with several side effects and relevance of drug resistance which evoke an immediate need for designing of new anticancer agents with multitargeted effect. Imidazole is a heterocyclic compound privileged with considerable anticancer activities and some imidazole derivatives have already got approval to treat cancer. Many hybrid molecules are available that play an important role in the treatment of cancer like chalcone, pyrazole, purine, triazine etc., and their pharmacophore provide the anticancer drug with low drug resistance and high efficacy, with low chances of toxicity and side effects. This review provides various approaches for the drug development of new safe and efficient antitumor agents imidazole hybrids with other heterocyclic moieties. An attempt has been made to advancement of the anticancer potential of the derivatives and hybrids of imidazole having intact or condensed imidazole moiety in the last decade along with the structure‐activity relationship studies, and mechanism of action.

Anticancer Active Heterocyclic Chalcones: Recent Developments

BACKGROUND

Chalcones are structurally simple compounds that are easily accessible by synthetic methods. Heterocyclic chalcones have gained the interest of scientists due to their diverse biological activities. The anti-tumor activities of heterocyclic chalcones are especially remarkable and the growing number of publications dealing with this topic warrants an up-to-date compilation.

METHODS

Search for antitumor active heterocyclic chalcones was carried out using Pubmed and Scifinder as common web-based literature searching tools. Pertinent and current literature was covered from 2015/2016 to 2019. Chemical structures, biological activities and modes of action of anti-tumor active heterocyclic chalcones are summarized.

RESULTS

Simply prepared chalcones have emerged over the last years with promising antitumor activities. Among them, there are a considerable number of tubulin polymerization inhibitors. But there are also new chalcones targeting special enzymes such as histone deacetylases or with DNA-binding properties.

CONCLUSION

This review provides a summary of recent heterocyclic chalcone derivatives with distinct antitumor activities.

First COVID-19 molecular docking with a chalcone-based compound: synthesis, single-crystal structure and Hirshfeld surface analysis study

The first example of molecular docking of the SARS-CoV-2 main protease for COVID-19 [M^pro, Protein Data Bank (PDB) code 7BQY] by a chalcone-based ligand, namely, (E)-1-(2,4-dichlorophenyl)-3-[4-(morpholin-4-yl)phenyl]prop-2-en-1-one, C₁₉H₁₇Cl₂NO₂, I, is presented. Two-dimensional (2D) LIGPLOT representations calculated for the inhibitor N3, viz. N-{[(5-methylisoxazol-3-yl)carbonyl]alanyl}-L-valyl-N₁-((1R,2Z)-4-(benzyloxy)-4-oxo-1-{[(3R)-2-oxopyrrolidin-3-yl]methyl}but-2-enyl)-L-leucinamide, and 7BQY are included for comparison with our chalcone-based complexes. The binding affinity of our chalcone ligand with 7BQY is -7.0 kcal mol^-1, a high value which was attributed to the presence of a hydrogen bond, together with many hydrophobic interactions between the drug and the active amino acid residues of the receptor. Docking studies were also performed, employing rigid and flexible binding modes for the ligand. The superposition of N3 and the chalcone docked into the binding pocket of 7BQY is also presented. The synthesis, single-crystal structure, Hirshfeld surface analysis (HSA) and spectral characterization of heterocyclic chalcone-based compound I, are also presented. The molecules are stacked, with normal π-π interactions, in the crystal.

Chalcone hybrids as potential anticancer agents: Current development, mechanism of action, and structure-activity relationship

The continuous emergency of drug-resistant cancers and the low specificity of anticancer agents have been the major challenges in the control and treatment of cancer, making an urgent need to develop novel anticancer agents with high efficacy. Chalcones, precursors of flavonoids and isoflavonoids, exhibit structural heterogeneity and can act on various drug targets. Chalcones which demonstrated potential in vitro and in vivo activity against both drug-susceptible and drug-resistant cancers, are useful templates for the development of novel anticancer agents. Hybridization of chalcone moiety with other anticancer pharmacophores could provide the hybrids which have the potential to overcome drug resistance and improve the specificity, so it represents a promising strategy to develop novel anticancer agents. This review emphasizes the development, the mechanisms of action as well as structure-activity relationships of chalcone hybrids with potential therapeutic application for many cancers in recent 10 years.

Synthesis and Antiproliferative Activity of Novel 1,2,3-Triazole-Sulfonamide Hybrids

Nine novel 1-(4′-sulfamoylphenyl)-1,2,3-triazole derivatives bearing an N-heterocycle moiety were designed using a molecular hybridisation approach and synthesised by alkyne/azide click chemistry. Most of the synthesised compounds exhibited good to moderate antiproliferative activity (IC50 values 3.7 to 77.1 μM) against stomach, oesophagus and prostate cancer cell lines, but a compound containing an S-(2-pyridyl)thiomethyl moiety showed 10-fold greater activity against the stomach cell line than 5-fluorouracil. These results demonstrate that N-heterocycle-1,2,3-triazolylsulfonamides could be promising lead compounds to develop new antitumour drugs.

Design and Synthesis of Sulfonamide-1,2,3-Triazole Derivatives Bearing a Dithiocarbamate Moiety as Antiproliferative Agents

A series of nine novel 1-(4′-sulfamoylphenyl)-1,2,3-triazole derivatives bearing a 4-dithiocarbamylmethyl moiety were designed using the molecular hybridisation approach and synthesised by alkyne/azide click chemistry. Most of the synthesised compounds exhibited moderate to good antiproliferative activity against oesophagus, gastric and prostate cancer cell lines, but a compound containing a 4-( t-butoxycarbonyl)piperazinylthiocarbonyl moiety showed the highest activity. Against a prostate cancer cell line, it had an IC50 value of 2.4 μM, about 10-fold more active than 5-flurouracil. This work shows that novel sulfonamide-1,2,3-triazole derivatives bearing a dithiocarbamate moiety linked to a 4-substituted piperazine are promising lead compounds for the development of antitumour agents.

Molecular diversity of phenothiazines: design and synthesis of phenothiazine-dithiocarbamate hybrids as potential cell cycle blockers

Novel phenothiazine-dithiocarbamate analogues were designed by molecular hybridization strategy and synthesized and evaluated for their anticancer activity in vitro against three selected cancer cell lines (EC-109, MGC-803, and PC-3). The preliminary structure-activity relationship (SAR) for this phenothiazine-dithiocarbamate hybrids is explored. Among all analogues, 2-oxo-2-(10H-phenothiazin-10-yl)ethyl 4-ethylpiperazine-1-carbodithioate (8a) showed the most potent inhibitory activity with an [Formula: see text] value of [Formula: see text] against PC-3 cells. In addition, compound 8a could arrest the cell cycle at the G1 phase and regulate the expression of G1 checkpoint-related proteins, suggesting that phenothiazine-dithiocarbamate hybrids might be useful as cell cycle blockers.

Design, Synthesis and Antiproliferative Evaluation of 3-Aminopropyloxy Derivatives of Chalcone

A series of 3-aminopropyloxy derivatives of chalcone were synthesised and evaluated for their antiproliferative activity against liver, gastric and neuroendocrine cancer cell lines. Most of the synthesised compounds exhibited moderate to good activity against all three cancer cell lines, but in particular, a 3-(pyrrolidin-1-yl)propyloxy chalcone containing a 3,4,5-trimethoxyphenyl group showed the highest antiproliferative activity with an IC50 value of 2.74 μM against liver cancer cells.