Original title: Phthalazine as a medically versatile polyheterocyclic core with underexplored anticancer potential
Mikołaj Biegański, Joanna Matysiak, Monika Szeliga · September 2026
Cancer treatments need new molecules that can effectively stop tumors from growing. Researchers are studying phthalazine derivatives, which are chemical structures built around rings containing nitrogen atoms. In this review, scientists looked at how these molecules work against cancer. They found that phthalazine derivatives can block two important targets: PARP, an enzyme involved in cell repair, and VEGFR, a protein linked to blood vessel growth. By blocking these targets, several phthalazine drugs succeeded in human clinical trials and were launched on the market. Additionally, laboratory tests outside the body showed that many other related phthalazine compounds stop cancer cells effectively. The researchers also examined ways to build these molecules in the lab and suggested future improvements for creating new oncology treatments.
You have a set of tools that work perfectly for fixing furniture. But you suspect they might also repair electronics, yet no one has tested them for that. Here, the tools are phthalazine derivatives, already proven for some cancers, and the review investigates their untested potential for other cancers, along with new ways to synthesize them.
Phthalazine derivatives are already used in some cancer treatments, but this review shows they could work against more cancer types. Researchers now have a roadmap to develop new drugs from this family, potentially expanding options for patients who do not respond to current therapies.
This paper is a review, so it does not report new experiments or clinical data. It compiles existing studies, meaning the conclusions depend on the quality of the original research. The 'underexplored potential' is suggested but not demonstrated with new evidence.
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Phthalazine as a medically versatile polyheterocyclic core with underexplored anticancer potential — Mikołaj Biegański, Joanna Matysiak, Monika Szeliga — Journal of enzyme inhibition and medicinal chemistry — doi:10.1080/14756366.2026.2717060
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.