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Structural Studies in Drug Discovery and Development: From the Lead to the Pharmaceutical Form, 2nd Edition

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: 31 May 2025 | Viewed by 783

Special Issue Editors


E-Mail Website
Guest Editor
Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy
Interests: diffraction techniques; structure elucidation; conformation of bioactive compounds; antitubercular and anticancer agents; metal complexes; protein–protein interaction inhibitors; enzymatic inhibitors; multi-target drugs
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy
Interests: diffraction techniques; structure elucidation; conformation of bioactive compounds; antitubercular and anticancer agents; metal complexes; protein–protein interaction inhibitors; enzymatic inhibitors; multi-target drugs
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Following the remarkable success of the first edition of the Special Issue “Structural Studies in Drug Discovery and Development: From the Lead to the Pharmaceutical Form” (https://www.mdpi.com/journal/crystals/special_issues/Pharmaceutical_Form), which published 10 articles, we are pleased to announce the second edition of this Special Issue.

Crystallography is an invaluable tool in the pharmaceutical field for the study of both ligands and biological targets. In the early stages of the drug discovery process, single-crystal X-ray diffraction (SC-XRD) is a necessary resource for the synthesis of many compounds. For instance, it supports the correct identification of isomers when the results provided by other techniques prove inconclusive. Even more importantly, it allows the definition of the absolute configuration of stereoisomers. The study of atropisomers or the investigation of the coordination chemistry of metallodrugs constitute other notable examples of the several applications of SC-XRD in drug discovery. Furthermore, the important contribution of structural biology in the definition of the binding mode of compounds to their molecular targets should also be acknowledged. However, the relevance of crystallography is not limited to the lead selection and development phases. An extensive analysis of the solid state, especially when focused on the study of intermolecular interactions and crystal packing, is fundamental for the examination of polymorphic forms and co-crystals. These data are often pivotal for the identification of the most suitable pharmaceutical form and to derive information on its solubility and stability.

Based on these premises, we would be pleased if you would agree to contribute either an original research paper, a short communication, or a focus review to this Special Issue.

Dr. Matteo Mori
Dr. Fiorella Meneghetti
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. Crystals is an international peer-reviewed open access monthly 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 2100 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

  • single-crystal X-ray diffraction
  • structural analysis
  • spectroscopic methods
  • spectrometric methods
  • pharmaceutical compounds
  • biologically active molecules
  • organic molecules
  • metal complexes
  • synthetic intermediates
  • atropisomers
  • absolute configuration
  • asymmetric synthesis
  • catalysis
  • mechanistic investigations
  • polymorphism
  • co-crystals
  • solubility

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Related Special Issue

Published Papers (2 papers)

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Research

18 pages, 953 KiB  
Article
Complexes of Cd(II) with Nicotinamide, Nitrate, and Oxalate as Mixed Ligands: Synthesis, Characterization, and Biological Activity
by Laurentiu Pricop, Ioana Cristina Marincas, Anamaria Hanganu, Mihaela Ganciarov, Augustin M. Mădălan and Maria Olimpia Miclăuș
Crystals 2025, 15(2), 140; https://doi.org/10.3390/cryst15020140 - 27 Jan 2025
Viewed by 233
Abstract
Three complexes of Cd(II), [Cd(NA)₂(NO₃)₂(H₂O)₂] (1), [Cd(NA)₂(NO₃)₂(H₂O)₂]·2NA (2), and [Cd(ox)(NA)(H₂O)]·H₂O (3) (NA = nicotinamide, ox = oxalate) were synthesized and characterized. Complexes (1) and (2) are mononuclear, while complex (3) is a bidimensional polymeric coordination compound, with oxalate anions bridging metal ions in [...] Read more.
Three complexes of Cd(II), [Cd(NA)₂(NO₃)₂(H₂O)₂] (1), [Cd(NA)₂(NO₃)₂(H₂O)₂]·2NA (2), and [Cd(ox)(NA)(H₂O)]·H₂O (3) (NA = nicotinamide, ox = oxalate) were synthesized and characterized. Complexes (1) and (2) are mononuclear, while complex (3) is a bidimensional polymeric coordination compound, with oxalate anions bridging metal ions in two different ways: µ₂ bis-bidentate chelating manner and µ₄ bis-bidentate bis-monodentate manner. The stereochemistry of Cd(II) in compounds (1) and (3) is a distorted pentagonal bipyramid, while in compound (2) it is a regular octahedron. Complexes (1) and (2) demonstrated significant activity against Enterococcus faecalis and Escherichia coli, showcasing their potential as effective antibacterial agents and inhibitors of microbial adhesion. The complexes were characterized by means of single-crystal X-ray diffraction, elemental analysis, FTIR (all complexes), 1H NMR, 13C NMR, fluorescence spectroscopy, and antimicrobial activity (complexes (1) and (2)). Full article
14 pages, 27309 KiB  
Article
The Role of Hydrogen Bond Interactions in Crystal Formation of Pyrrolo-Azines Alcohols
by Marcel Mirel Popa, Mihai Răducă, Isabela C. Man and Florea Dumitrascu
Crystals 2025, 15(1), 78; https://doi.org/10.3390/cryst15010078 - 15 Jan 2025
Viewed by 442
Abstract
New secondary alcohols of type Ar-CHOH-hetaryl and MeCHOH-hetaryl, the radical hetaryl being a pyrroloazine, were investigated in solid state by X-ray single-crystal diffraction analysis, Hirshfeld analysis and DFT methods to assess their crystallographic features. One of the most important features is the presence [...] Read more.
New secondary alcohols of type Ar-CHOH-hetaryl and MeCHOH-hetaryl, the radical hetaryl being a pyrroloazine, were investigated in solid state by X-ray single-crystal diffraction analysis, Hirshfeld analysis and DFT methods to assess their crystallographic features. One of the most important features is the presence of the hydroxyl group bonded to an asymmetric carbon atom which was involved in strong hydrogen bonds. The driving force of crystal packing is H-bond with the O-H···O=C/N≡C bonds being considered as strong comparative to carboxylic acids. These structural properties and binding affinity might lead to enhanced bioavailability of these particular pyrrolo-azines Full article
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