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Open research questions in Click Chemistry and Applications

104 unresolved questions extracted from the limitations and future-work sections of 294 Click Chemistry and Applications papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • the practical application of Cu(I)-and Cu(II)-based homogeneous catalysts is limited due to challenges such as difficult recovery and metal contamination, - the study does not provide a comprehensive comparison with other catalysts, - the long-term stability of the Cu(II)/His-ZIF-8 catalyst is not discussed

    Histidine-functionalized mixed-linker ZIF-8 for enhanced copper immobilization and efficient 1,2,3-triazole synthesis · 2026 · DOI

  • further studies on the recyclability and reusability of the Cu(II)/His-ZIF-8 catalyst are needed, - investigations on the application of the Cu(II)/His-ZIF-8 catalyst in other reactions are required, - research on the scalability of the synthesis of the Cu(II)/His-ZIF-8 catalyst is necessary

    Histidine-functionalized mixed-linker ZIF-8 for enhanced copper immobilization and efficient 1,2,3-triazole synthesis · 2026 · DOI

  • Experimental validation of the identified compounds is needed to confirm their efficacy, - Further studies are required to explore the potential of polypharmacology-based strategies for AML therapy, - Investigation of other potential AML targets and therapeutic agents is necessary

    Drug Repurposing for AML: Structure-Based Virtual Screening and Molecular Simulations of FDA-Approved Compounds with Polypharmacological Potential · 2025 · DOI

  • Current targeted therapies for AML are often limited by compensatory signaling and clonal evolution. There is a need for compounds with multitarget potential to modulate key epigenetic, apoptotic, and metabolic pathways in AML.

    Drug Repurposing for AML: Structure-Based Virtual Screening and Molecular Simulations of FDA-Approved Compounds with Polypharmacological Potential · 2025 · DOI

  • While bioorthogonal click chemistry has transformed chemical biology, chelation‐assisted transition‐metal catalysis has emerged as a powerful yet still underexplored alternative tool for studying biological processes.

    Chelation‐Assisted Metal‐Catalyzed Ligation and Cleavage Reactions for Chemical Biology · 2026 · DOI

  • Despite the significant advances in systems chemistry, strategies to rationally expand the complexity of chemical feedback loops in a defined and modular way remain scarce.

    A Redox-Mediated Negative Feedback Loop Based on Tetrazine-Thiol Exchange · 2026 · DOI

  • Nevertheless, a number of challenges remain to be addressed, including the need for improved reaction kinetics, enhanced biocompatibility, and the development of a more diverse and orthogonal set of reactions.

    Not So Bioorthogonal Chemistry · 2025 · DOI

  • Pyridines are ubiquitous scaffolds in pharmaceuticals, yet their close analogues, pyridazines with two adjacent ring nitrogens, remain underexplored owing to limited synthetic access.

    Pyridine-to-Pyridazine Skeletal Editing · 2025 · DOI

  • Although kinetic parameters provide a path to their optimization, systematic design strategies and practical guidance remain underexplored.

    Profiling and Optimizing Targeted Covalent Inhibitors through EGFR-Guided Studies · 2025 · DOI

  • However, this strategy has largely been limited by the scope of functional groups and the biocompatible reaction conditions available.

    Near-Infrared Photoredox Catalyzed Fluoroalkylation Strategy for Protein Labeling in Complex Tissue Environments · 2024 · DOI

  • However, examples employing palladium catalysis have rarely been disclosed, and the processes of reactivity and selectivity remain unclear.

    Pd/Cu Dual Metal-Catalyzed Regioselective [2 + 2 + 2] Cycloaddition of Malononitriles with Alkynes to Densely Substituted Pyridines · 2024 · DOI

  • Crucially, this approach uncovers the differential reactivity for ether vs amine tethers, thus providing facile and scalable access to underexplored medicinally relevant heterocyclic entities.

    Structurally Diverse Nitrogen-Rich Scaffolds via Continuous Photo-Click Reactions · 2024 · DOI

  • Further exploration of the use of chemical innovations to generate synthetic proteins. Investigation of the potential applications of engineered proteins in therapeutic development. Development of new methods for protein engineering that can leverage advances in synthetic organic chemistry and structural elucidation technologies.

    Advancing protein engineering via organic chemistry · 2026 · DOI

  • The need for novel approaches to protein engineering that can leverage advances in synthetic organic chemistry and structural elucidation technologies. The challenge of designing proteins with tailored properties for specific applications. The gap in understanding how to expand the protein engineering repertoire to facilitate the design of synthetic variants with improved efficiency.

    Advancing protein engineering via organic chemistry · 2026 · DOI

  • The need for a review of the history and methodology of Huisgen 1,3-dipolar cycloaddition. The need for a discussion of the click chemistry concept and Cu(I)-catalyzed azide–alkyne cycloaddition.

    SYNTHESIS AND DEVELOPMENT HISTORY OF 1,2,3-TRIAZOLES · 2026 · DOI

  • Further evaluation of the pharmacokinetic properties and toxicity of the synthesized derivatives. Exploration of the potential of 1,2,3-triazole derivatives as dual-acting molecules against infections and malignancies. Application of sonochemical synthesis to the synthesis of other complex molecules.

    Computational design and sonochemical synthesis of triazolo benzimidazole derivatives as an antimicrobial agent · 2026 · DOI

  • The development of novel therapeutic agents for the treatment of antimicrobial-resistant infections. The lack of dual-acting molecules that are effective against both infections and malignancies.

    Computational design and sonochemical synthesis of triazolo benzimidazole derivatives as an antimicrobial agent · 2026 · DOI

  • The gap in current research is the need for novel compounds with anticancer activity. The gap is the lack of understanding of the importance of the sugar moiety in the glycosyl-1,2,3-triazolyl system.

    Design, click-based synthesis, molecular docking, molecular dynamics and anticancer activity of new isoindoline-1,3-dione- triazole-glycopyranosyl hybrids · 2026 · DOI

  • There is a need for novel anti-HIV agents that can address the limitations of current antiretroviral therapy. Natural phytochemicals offer a potential source of novel anti-HIV agents.

    Molecular Docking Evaluation of Curcumin, Ursolic Acid, Quercetin, Berberine, and Andrographolide Against HIV-1 Reverse Transcriptase and Protease · 2026 · DOI

  • 9 Study Limitations Several limitations of this study should be acknowledged. Bioavailability enhancement strategies should be explored for curcumin and berberine, including nanoparticle formulations, liposomal encapsulation, phytosome complexes, and co-administration with piperine. First, molecular docking provides computational predictions of binding affinity but does not account for protein flexibility, solvent effects, or entropic contributions.

    Molecular Docking Evaluation of Curcumin, Ursolic Acid, Quercetin, Berberine, and Andrographolide Against HIV-1 Reverse Transcriptase and Protease · 2026 · DOI

  • Future research should focus on the development of covalent PPI inhibitors and degrader technologies. The integration of artificial intelligence-guided virtual screening and cryo-electron microscopy data should be further explored. Emerging applications in infectious disease, neurodegeneration, and inflammatory signalling should be investigated.

    RECENT ADVANCES IN THE DESIGN AND SYNTHESIS OF SMALL-MOLECULE INHIBITORS FOR PROTEIN–PROTEIN INTERACTIONS · 2026 · DOI

  • The development of a novel Cys-protecting group that can facilitate efficient one-pot peptide ligation. The synthesis of complex post-translationally modified proteins, such as glycosylated proteins. The need for a methodology that can demonstrate complete orthogonality to native chemical ligation and desulfurization conditions.

    4‐Formyl‐N‐Methylpyridinium‐Mediated N‐Terminal Cysteine Modification/Removal Facilitates One‐Pot Multiplex Peptide Ligation · 2026 · DOI

  • Current N-terminal cysteine protection methods have limitations, such as requiring various reagents or pH adjustments. There is a need for a novel Cys-protecting group that can facilitate efficient one-pot peptide ligation.

    4‐Formyl‐N‐Methylpyridinium‐Mediated N‐Terminal Cysteine Modification/Removal Facilitates One‐Pot Multiplex Peptide Ligation · 2026 · DOI

  • KRAS has shallow binding surfaces. KRAS has conformational flexibility. KRAS has limited availability of druggable pockets.

    Molecular Dynamics–Based validation of a quinazoline-based KRAS inhibitor (C9) identified through QSAR-guided discovery · 2026 · DOI

  • The increasing prevalence of drug-resistant microbial infections demands the development of novel antimicrobial agents. There is a need for the design and synthesis of novel bis-azole hybrids with improved efficacy and safety profiles.

    Rational design and synthesis of novel bis-azole hybrids: biological evaluation and computational insights · 2026 · DOI

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104 open questions have been extracted from the limitations and future-work passages of 294 Click Chemistry and Applications papers in our 4.5M-paper local library. Each one below links back to the study that raised it, so you can read the original claim in context.

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