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Synthesis and Transformations of Bioactive Cyclic Imides

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Biochemistry".

Deadline for manuscript submissions: closed (20 February 2026) | Viewed by 703

Special Issue Editor

Special Issue Information

Dear Colleagues,

We are delighted to announce a call for submissions to this Special Issue of the International Journal of Molecular Sciences, entitled “Synthesis and Transformations of Bioactive Cyclic Imides”.

Molecules bearing imide fragments are widely known for their versatile biological activities; thus, these compounds show great prospects within novel bioactive agents.

Glutarimide and thalidomide derivatives are essential fragments for the synthesis of various proteolysis targeting chimera (PROTAC) compounds in the field of proximity-driven drug degradation. As these compounds readily bind to the protein Cereblon, the targeted degradation of various proteins becomes possible via utilizing the ubiquitin–proteasome system, making valuable assets in the fight against a broad range of diseases, e.g., different types of malignancies.

Digressing further from protein degradation, compounds bearing maleimide moiety, on the other hand, are valuable tools for targeted protein conjugation, essential for the synthesis of novel antibody–drug conjugates (ADCs) and the labeling of various proteins.

Phthalimides could be mentioned as a third valuable group of imides. These compounds have various biological properties, such as anticancer, antibacterial, and antiviral properties, along with benign effects on various neurological diseases.

Lead by Prof. Dr. István Szatmáriand and assisted by Dr. Péter Simon (University of Szeged), we encourage submissions of both original research articles and topical reviews on all aspects of synthesis and pharmacological studies on different imide derivatives to this Special Issue. All submitted articles will be subject to peer review.

Prof. Dr. István Szatmári
Guest Editor

Manuscript Submission Information

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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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • PROTAC
  • phthalimides
  • maleimides
  • cyclic imides
  • targeted protein degradation
  • protein labeling
  • antibody–drug conjugates
  • drug design and synthesis
  • drug conjugation

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Published Papers (1 paper)

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Research

23 pages, 2290 KB  
Article
A First Diversity-Oriented N-Maleopimarimido-Isocyanide for Multicomponent Reactions: Synthesis, Application, and In Silico Evaluation
by Elena Tretyakova, Anna Smirnova and Oxana Kazakova
Int. J. Mol. Sci. 2026, 27(8), 3494; https://doi.org/10.3390/ijms27083494 - 14 Apr 2026
Viewed by 261
Abstract
Multicomponent reactions with isocyanides (IMCRs) enable the one-step assembly of complex molecules and remain a powerful strategy for accessing bioactive scaffolds. Here, we report the first synthesis of an abietane diterpene isocyanide derived from aminoimide methyl maleopimarate 1, a levopimaric acid-maleic anhydride [...] Read more.
Multicomponent reactions with isocyanides (IMCRs) enable the one-step assembly of complex molecules and remain a powerful strategy for accessing bioactive scaffolds. Here, we report the first synthesis of an abietane diterpene isocyanide derived from aminoimide methyl maleopimarate 1, a levopimaric acid-maleic anhydride adduct. This isocyanide was further engaged in Passerini, Ugi, and azido-Ugi reactions to provide a series of α-acyloxy- and α-acylaminocarboxamides, as well as tetrazoles, in high yields under optimized conditions. The structures of all products were confirmed by comprehensive physicochemical analysis. In silico ADME, drug-likeness, target prediction, and toxicity studies (SwissADME, ProTox-III) revealed moderate lipophilicity with favorable membrane permeability and solubility, high gastrointestinal absorption, and selective CYP3A4 inhibition with no significant effects on other CYP450 isoforms. The compounds fulfill major drug-likeness criteria, lacking undesirable reactive fragments, with only acceptable deviations in molecular weight and flexibility typical for MCR-derived products. The modifications broaden the spectrum of predicted biological targets while maintaining low overall toxicity and absence of predicted hepato- or carcinogenicity. These results demonstrate that diterpene isocyanide is a valuable building block for chemical libraries of structurally diverse abietane derivatives with peptide-like termini and highlight its potential as a source of cytotoxic, antiviral, and anti-inflammatory candidates. Full article
(This article belongs to the Special Issue Synthesis and Transformations of Bioactive Cyclic Imides)
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