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The Design, Synthesis, and Biological Activity of New Drug Candidates, 2nd Edition

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Medicinal Chemistry".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 423

Special Issue Editors


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Guest Editor
LAQV—REQUIMTE, Institute for Research and Advanced Studies, University of Évora, Rua Romão Ramalho, 59, 7000-641 Évora, Portugal
Interests: organic synthesis; ionic liquids; green chemistry; pharmaceutics and pharmaceutical technology; ligand; catalysis; toxicology
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
1. Egas Moniz Interdisciplinary Research Center (CiiEM), Egas Moniz School of Health and Science, Quinta da Granja, 2829-511 Monte da Caparica, Portugal
2. iBB—Institute for Bioengineering and Biosciences and Associate Laboratory i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, University of Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
3. CQC-IMS, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
Interests: drug delivery; drug discovery; medicinal chemistry; biomaterials; sustainability; multicomponent reactions
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Faculty of Pharmacy, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
Interests: organic synthesis; synthesis; polymers; synthetic organic chemistry; synthetic chemistry; medicinal and pharmaceutical chemistry; heterocyclic chemistry; antimicrobials; organic chemistry synthesis; biomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Over the last decades, tremendous efforts have been made by the scientific community to transform the world to a better place. Ending poverty and hunger, protecting the planet from degradation and ensuring healthier lives are the main long-term goals. In particular, through drug discovery and development, researchers are committed to fight against complex and mortal diseases, study their physiopathology and intervene in the discovery of new therapeutic options, or the best practices to provide patients longer (and better) lives, while focusing on the sustainability of these approaches, decreasing the impact on resources, and simultaneously decreasing the socioeconomic burden of diseases.

The design and synthesis of new bioactive molecules, as well as new approaches to attain well-known active pharmaceutical ingredients (APIs) and natural products, while promoting sustainability, continue to be contemporary challenges, growing with the emergence to cure or ameliorate complex diseases and downplay drug resistance.

This Special Issue intends to emphasize updated contributions in the design, synthesis and application of bioactive compounds as drug candidates, revealing the discovery of promising hit scaffolds, hit-to-lead generation strategies and privilege units as pharmacophores. New and sustainable approaches to synthesise well-established APIs and natural products that can contribute to improving medicine accessibility will also be considered. Works that analyse sustainable, innovative and economically favoured strategies in the design of the focused libraries will enrich the Special Issue. Review articles by experts in the field are also welcome.

Dr. Carolina S. Marques
Dr. Pedro Brandão
Dr. Anthony J. Burke
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioactive
  • in silico
  • in vitro
  • in vivo
  • ADMET
  • synthesis
  • privilege scaffold
  • active pharmaceutical ingredients

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Related Special Issue

Published Papers (2 papers)

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Research

41 pages, 11116 KiB  
Article
In Silico Identification and Characterization of Spiro[1,2,4]triazolo[1,5-c]quinazolines as Diacylglycerol Kinase α Modulators
by Lyudmyla Antypenko, Kostiantyn Shabelnyk, Oleksii Antypenko, Mieko Arisawa, Oleksandr Kamyshnyi, Valentyn Oksenych and Serhii Kovalenko
Molecules 2025, 30(11), 2324; https://doi.org/10.3390/molecules30112324 - 26 May 2025
Viewed by 94
Abstract
A new class of spiro[1,2,4]triazolo[1,5-c]quinazoline derivatives is presented as promising modulators of diacylglycerol kinase α (DGK-α), a target implicated in cancer, neurological disorders, and immune dysfunction. Through structure-based computational design using the CB-Dock2 platform with human DGK-α (PDB ID: 6IIE), 40 [...] Read more.
A new class of spiro[1,2,4]triazolo[1,5-c]quinazoline derivatives is presented as promising modulators of diacylglycerol kinase α (DGK-α), a target implicated in cancer, neurological disorders, and immune dysfunction. Through structure-based computational design using the CB-Dock2 platform with human DGK-α (PDB ID: 6IIE), 40 novel compounds were systematically evaluated along with established inhibitors (ritanserin, R59022, R59949, BMS502, and (5Z,2E)-CU-3) across five distinct binding pockets. Several compounds demonstrated binding profiles at the level of or surpassing the reference compounds. The physicochemical analysis revealed balanced drug-like properties with favorable molecular weights (252–412 g/mol) and appropriate three-dimensionality. The toxicological assessment indicated reassuring safety profiles with predicted LD50 values of 1000–2000 mg/kg and minimal hepatotoxicity, carcinogenicity, and mutagenicity potential. Notably, compound 33 (adamantyl-substituted) emerged as exceptionally promising, exhibiting strong binding affinity, moderate solubility, and selective CYP inhibition patterns that minimize drug–drug interaction risks. Detailed molecular interaction mapping identified critical binding determinants, including strategic hydrogen bonding with TRP151, GLU166, and ARG126. The multidimensional evaluation identified compounds 13, 18, 33, and 40 as particularly promising candidates that balance potent target engagement with favorable pharmaceutical profiles, establishing this scaffold as a valuable platform for developing next-generation therapeutics targeting DGK-α -mediated signaling pathways. Full article
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25 pages, 3752 KiB  
Article
Synthesis of 3-Carboxy-6-sulfamoylquinolones and Mefloquine-Based Compounds as Panx1 Blockers: Molecular Docking, Electrophysiological and Cell Culture Studies
by Letizia Crocetti, Maria Paola Giovannoni, Tengis S. Pavlov, Veniamin Ivanov, Fabrizio Melani and Gabriella Guerrini
Molecules 2025, 30(10), 2171; https://doi.org/10.3390/molecules30102171 - 15 May 2025
Viewed by 183
Abstract
The membrane channel protein Panx1 is a promising therapeutic target since its involvement was demonstrated in a variety of pathologies such as neuropathic pain, ischemic stroke and cancer. As a continuation of our previous work in this field, we report here the synthesis [...] Read more.
The membrane channel protein Panx1 is a promising therapeutic target since its involvement was demonstrated in a variety of pathologies such as neuropathic pain, ischemic stroke and cancer. As a continuation of our previous work in this field, we report here the synthesis and biological evaluation of two classes of compounds as Panx1 blockers: 3-carboxy-6-sulphonamidoquinolone derivatives and new Mefloquine analogs. The series of 3-carboxy-6-sulphonamidoquinolones gave interesting results, affording powerful Panx1 channel blockers with 73.2 < I% < 100 at 50 µM. In particular, 12f was a more potent Panx1 blocker than the reference compound CBX (IC50 = 2.7 µM versus IC50 = 7.1 µM), and its profile was further investigated in a cell culture model of polycystic kidney disease. Finally, interesting results have been highlighted by new molecular modeling studies. Full article
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