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ChemMedChem Apr 2024N-Pyrazolylcarboxamides and N-pyrazolylureas represent promising lead compounds for the development of novel antileishmanial drugs. Herein, we report the late-stage...
N-Pyrazolylcarboxamides and N-pyrazolylureas represent promising lead compounds for the development of novel antileishmanial drugs. Herein, we report the late-stage diversification of 3-bromopyrazoles 10 A/B and 14 A by Pd-catalyzed Sonogashira and Suzuki-Miyaura cross coupling reactions. The electron-withdrawing properties of the cyano moiety in 4-position of the pyrazole ring limited the acylation of the primary amino moiety in 5-position. A large set of pyrazoles bearing diverse aryl and alkynyl substituents in 3-position was prepared and the antileishmanial and antitrypanosomal activity was recorded. The urea 38 lacking the electron withdrawing cyano moiety in 4-position and containing the large 4-benzylpiperidinoo moiety exhibited a modest antileishmanial (IC=19 μM) and antitrypanosomal activity (IC=7.9 μM)). However, its considerable toxicity against the PMM and MRC-5 cells indicates low selectivity, i. e. a small gap between the desired antiparasitic activity and undesired cytotoxicity of <2- to 4-fold.
Topics: Antiprotozoal Agents; Antiparasitic Agents; Pyrazoles
PubMed: 38289147
DOI: 10.1002/cmdc.202400028 -
International Journal of Molecular... Aug 2023Pyrazole derivatives, as a class of heterocyclic compounds, possess unique chemical structures that confer them with a broad spectrum of pharmacological activities. They... (Review)
Review
Pyrazole derivatives, as a class of heterocyclic compounds, possess unique chemical structures that confer them with a broad spectrum of pharmacological activities. They have been extensively explored for designing potent and selective anticancer agents. In recent years, numerous pyrazole derivatives have been synthesized and evaluated for their anticancer potential against various cancer cell lines. Structure-activity relationship studies have shown that appropriate substitution on different positions of the pyrazole ring can significantly enhance anticancer efficacy and tumor selectivity. It is noteworthy that many pyrazole derivatives have demonstrated multiple mechanisms of anticancer action by interacting with various targets including tubulin, EGFR, CDK, BTK, and DNA. Therefore, this review summarizes the current understanding on the structural features of pyrazole derivatives and their structure-activity relationships with different targets, aiming to facilitate the development of potential pyrazole-based anticancer drugs. We focus on the latest research advances in anticancer activities of pyrazole compounds reported from 2018 to present.
Topics: Antineoplastic Agents; Pyrazoles; Cell Line; Structure-Activity Relationship; Tubulin
PubMed: 37628906
DOI: 10.3390/ijms241612724 -
Molecular Diversity Nov 2020A series of benzopyrano[2,3-c]pyrazol-4(2H)-one derivatives were synthesized from readily available 1-phenyl- and 1-methyl-1H-pyrazol-3-ols by sequentially employing...
A series of benzopyrano[2,3-c]pyrazol-4(2H)-one derivatives were synthesized from readily available 1-phenyl- and 1-methyl-1H-pyrazol-3-ols by sequentially employing O-acylation, Fries rearrangement and potassium carbonate-induced cyclization. The anthelmintic properties of the obtained compounds were investigated in vivo in a model nematode, Caenorhabditis elegans. Five compounds, namely 2-phenyl[1]benzopyrano[2,3-c]pyrazol-4(2H)-one 33 and its 7-fluoro, 7-chloro-, 7-bromo- and 8-fluoro-analogues, 36, 38, 40 and 43, respectively, altered the development of C. elegans. While the activities of 33 and 43 were rather modest, compounds 36, 38 and 40 inhibited the growth of the worms at concentrations of approximately 1-3 µM. At these concentrations, the compounds did not kill the worms, but they strongly inhibited their development, with the majority of larvae never progressing past the L1 stage. Moreover, testing in non-cancer human cell lines showed that, with exception of 7-bromo derivative 40, the active compounds have favourable toxicity profiles.
Topics: Animals; Anthelmintics; Caenorhabditis elegans; Cell Line; Cyclization; Humans; Larva; Pyrazoles; Structure-Activity Relationship
PubMed: 31713185
DOI: 10.1007/s11030-019-10010-3 -
Bioorganic Chemistry Feb 2022Both HIV and DENV are serious threats to human life, health and social economy today. So far, no vaccine for either HIV or DENV has been developed successfully. The...
Both HIV and DENV are serious threats to human life, health and social economy today. So far, no vaccine for either HIV or DENV has been developed successfully. The research on anti-HIV or DENV drugs is still of great significance. In this study we developed a series of novel 2-Aryl-1H-pyrazole-S-DABOs with C6-strucutral optimizations as potent NNRTIs, among which, 8 compounds had low cytotoxicity and EC values in the range of 0.0508 ∼ 0.0966 μM, and their selectivity index was SI > 1415 ∼ 3940. In particular, two compounds 4a and 4b were identified to have good inhibitory effects on DENV of four serotypes. The EC of compound 4a and 4b against DENV-II (13.2 μM and 9.23 μM, respectively) were better than that of the positive control ribavirin (EC = 40.78 μM). In addition, the effect of C-6 substituents on the anti-HIV or anti-DENV activity of these compounds was also discussed.
Topics: Antiviral Agents; Dengue Virus; Dose-Response Relationship, Drug; HIV-1; Microbial Sensitivity Tests; Molecular Structure; Pyrazoles; Structure-Activity Relationship
PubMed: 34836643
DOI: 10.1016/j.bioorg.2021.105494 -
Molecules (Basel, Switzerland) Feb 2021The remarkable prevalence of pyrazole scaffolds in a versatile array of bioactive molecules ranging from apixaban, an anticoagulant used to treat and prevent blood clots... (Review)
Review
The remarkable prevalence of pyrazole scaffolds in a versatile array of bioactive molecules ranging from apixaban, an anticoagulant used to treat and prevent blood clots and stroke, to bixafen, a pyrazole-carboxamide fungicide used to control diseases of rapeseed and cereal plants, has encouraged both medicinal and organic chemists to explore new methods in developing pyrazole-containing compounds for different applications. Although numerous synthetic strategies have been developed in the last 10 years, there has not been a comprehensive overview of synthesis and the implication of recent advances for treating neurodegenerative disease. This review first presents the advances in pyrazole scaffold synthesis and their functionalization that have been published during the last decade (2011-2020). We then narrow the focus to the application of these strategies in the development of therapeutics for neurodegenerative diseases, particularly for Alzheimer's disease (AD) and Parkinson's disease (PD).
Topics: Alzheimer Disease; Animals; Humans; Molecular Structure; Parkinson Disease; Pyrazoles
PubMed: 33668128
DOI: 10.3390/molecules26051202 -
Current Organic Synthesis 2023pyrimidine and pyrazole have various biological and pharmaceutical applications such as antibacterial, antifungal, antileishmanial, anti-inflammatory, antitumor, and...
AIM
pyrimidine and pyrazole have various biological and pharmaceutical applications such as antibacterial, antifungal, antileishmanial, anti-inflammatory, antitumor, and anti-cancer.
INTRODUCTION
In this search, the goal is to prepare pyrimidine-pyrazoles and study their anticancer activity.
METHODS
1-allyl-4-oxo-6-(3,4,5-trimethoxyphenyl)-1,4-dihydropyrimidine-5-carbonitrile bearing pyrazoles (4,6-8) have been synthesized. Firstly, the reaction of 1-allyl-2-(methylthio)-4-oxo-6- (3,4,5-trimethoxyphenyl)-1,4-dihydropyrimidine-5-carbonitrile (1) with chalcones 2a-b produced the intermediates 3a-b. The latter was reacted with hydrazine hydrate to give the targets 4a-b. On the other hand, hydrazinolysis of compound 1 yielded the hydrazino derivative 5 which upon reaction with chalcones 2c-i or 1,3-bicarbonyl compounds afforded the compounds 6-8. Finally, the new compounds were characterized by spectral data (IR, H NMR, C NMR) and elemental analysis. Moreover, they were evaluated for Panc-1, MCF-7, HT-29, A-549, and HPDE cell lines as anticancer activity.
RESULTS
All the tested compounds 3,4,6-8 showed IC values > 50 μg/mL against the HPDE cell line. Compounds 6a and 6e exhibited potent anticancer activity where the IC values in the range of 1.7- 1.9, 1.4-182, 1.75-1.8, and 1.5-1.9 μg/mL against Panc-1, MCF-7, HT-29, and A-549 cell lines.
CONCLUSION
New pyrimidine-pyrazole derivatives were simply synthesized, in addition, some of them showed potential anticancer activity.
Topics: Humans; Chalcones; Pyrimidines; Pyrazoles; HT29 Cells
PubMed: 36941818
DOI: 10.2174/1570179420666230320153649 -
Bioorganic Chemistry Apr 2020Pyrazole is a five-membered aromatic heterocyclic ring with two adjacent nitrogen atoms CHNH.The presence of this nucleus in pharmacological agents of various... (Review)
Review
Pyrazole is a five-membered aromatic heterocyclic ring with two adjacent nitrogen atoms CHNH.The presence of this nucleus in pharmacological agents of various therapeutic categories gifts a broad spectrum of biological activities and pharmaceuticals that contain pyrazole like celecoxib (anti-inflammatory), CDPPB (antipsychotic), Rimonabant (anti-obesity), Difenamizole, (Analgesic), Betazole (H2 receptor agonist), Fezolamide (Antidepressant), etc… The pharmacological potential of the pyrazole fraction is proved in many publication where they synthesized and evaluated pyrazoles against several biological agents. The aim of this article review is to survey recent works linking pyrazole structures to anticancer activities corresponding to 9 different type of cancer.
Topics: Animals; Antineoplastic Agents; Cell Line, Tumor; Chemistry Techniques, Synthetic; Drug Design; Drug Discovery; Drug Screening Assays, Antitumor; Humans; Neoplasms; Pyrazoles
PubMed: 32120072
DOI: 10.1016/j.bioorg.2019.103470 -
Scientific Reports Apr 2023Dual-tail strategy has been successfully utilized in the development of novel carbonic anhydrase IX (CA IX) inhibitors. Herein we adopted this approach in the design and...
Dual-tail strategy has been successfully utilized in the development of novel carbonic anhydrase IX (CA IX) inhibitors. Herein we adopted this approach in the design and synthesis of a series of novel pyridine sulfonamide-pyrazole hybrid scaffold mimicking dual-tail inhibitors of CA IX. A library of 15 compounds was synthesized and assessed for their potential cytotoxic effects against colorectal cancer cells. Compounds 3, and 11 induced potential cytotoxic effects against the three cancer cell lines (HCT-116, HT-29, and SW-620) with ICs' of 45.88, 28.27, and 16.57 uM, 25.01, 8.99, and 3.27 µM, respectively. Both compounds induced cellular apoptosis on HCT-116 and SW-620 cells, while compound 3 induced necrosis as well. In addition, both compounds induced cell cycle arrest on G0/G1, and S phases. Also, compound 11 showed potential autophagy induction on both colon cancer cell lines (HCT-116, and HT-29), and a little bit on metastatic type. Both compounds were less cytotoxic than the reference drug on normal epithelial cell. The migration rates of HCT-116 and the metastatic one SW-620 were reduced by both compounds. Finally, molecular docking of compounds 3 and 11 into the active site of CA IX confirmed in vitro inhibitory activity for both compounds.
Topics: Humans; Structure-Activity Relationship; Molecular Docking Simulation; Carbonic Anhydrase IX; Sulfonamides; Antineoplastic Agents; Colonic Neoplasms; Apoptosis; Pyrazoles; Molecular Structure; Cell Proliferation
PubMed: 37031294
DOI: 10.1038/s41598-023-32820-0 -
Future Medicinal Chemistry Sep 2023There has been an increasing trend in the design of novel pyrazole derivatives for desired biological applications. For a cost-effective strategy, scientists have... (Review)
Review
There has been an increasing trend in the design of novel pyrazole derivatives for desired biological applications. For a cost-effective strategy, scientists have implemented various computational drug design tools to go hand in hand with experiments for the design and discovery of potentially effective pyrazole-based therapeutics. This review highlights the milestones of pyrazole-containing inhibitors and the use of molecular modeling techniques in conjunction with experimental studies to provide a view of the binding mechanism of these compounds. The review focuses on the established targets that play a key role in cancer therapy, including proteins involved in tubulin polymerization, carbonic anhydrase and tyrosine kinase. Overall, using both experimental and computational methods in drug design represents a promising approach to cancer therapy.
Topics: Humans; Molecular Structure; Antineoplastic Agents; Models, Molecular; Pyrazoles; Neoplasms; Structure-Activity Relationship; Molecular Docking Simulation
PubMed: 37772542
DOI: 10.4155/fmc-2023-0142 -
Molecules (Basel, Switzerland) Jul 2022Pyrazole and its derivatives are considered a privileged -heterocycle with immense therapeutic potential. Over the last few decades, the pot, atom, and step economy... (Review)
Review
Pyrazole and its derivatives are considered a privileged -heterocycle with immense therapeutic potential. Over the last few decades, the pot, atom, and step economy (PASE) synthesis of pyrazole derivatives by multicomponent reactions (MCRs) has gained increasing popularity in pharmaceutical and medicinal chemistry. The present review summarizes the recent developments of multicomponent reactions for the synthesis of biologically active molecules containing the pyrazole moiety. Particularly, it covers the articles published from 2015 to date related to antibacterial, anticancer, antifungal, antioxidant, α-glucosidase and α-amylase inhibitory, anti-inflammatory, antimycobacterial, antimalarial, and miscellaneous activities of pyrazole derivatives obtained exclusively via an MCR. The reported analytical and activity data, plausible synthetic mechanisms, and molecular docking simulations are organized in concise tables, schemes, and figures to facilitate comparison and underscore the key points of this review. We hope that this review will be helpful in the quest for developing more biologically active molecules and marketed drugs containing the pyrazole moiety.
Topics: Anti-Bacterial Agents; Antifungal Agents; Chemistry, Pharmaceutical; Molecular Docking Simulation; Pyrazoles; alpha-Glucosidases
PubMed: 35897899
DOI: 10.3390/molecules27154723