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Pyreno-1,2,4-triazines as multifunctional luminogenic click reagents.

Hind Alshaikh^1,2, Jonathan Parsons², Gary Askwith²

¹Department of Chemistry, College of Science and Arts, King Abdulaziz University, Rabigh 21911, Saudi Arabia.

Organic & Biomolecular Chemistry

|October 22, 2025

Summary

This summary is machine-generated.

New pyreno-1,2,4-triazine derivatives with a C3 carbonyl group show enhanced reactivity in Inverse Electron Demand Diels-Alder (IEDDA) reactions with strained alkenes and alkynes, facilitating bioorthogonal chemistry applications.

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Area of Science:

Organic Chemistry
Chemical Biology
Materials Science

Background:

Pyrene is a well-known luminophore.
1,2,4-triazines are versatile heterocyclic compounds.
The Inverse Electron Demand Diels-Alder (IEDDA) reaction is crucial for bioorthogonal chemistry.

Purpose of the Study:

To synthesize novel 1,2,4-triazine derivatives incorporating a pyrene moiety.
To investigate the reactivity of these derivatives in IEDDA reactions.
To establish structure-reactivity relationships for these compounds.

Main Methods:

Synthesis of pyreno-1,2,4-triazine derivatives with a C3 carbonyl group.
Investigation of IEDDA reactions with strained dienophiles (BCN, TCO, s-TCO).
Computational analysis including transition state conformer searches.

Main Results:

Successful preparation of pyreno-1,2,4-triazine derivatives.
Demonstrated enhanced reactivity in IEDDA reactions compared to unsubstituted triazines.
Computational studies provided insights into structure-reactivity relationships.

Conclusions:

The C3 carbonyl group significantly enhances the IEDDA reactivity of pyreno-1,2,4-triazines.
These derivatives are promising tools for bioorthogonal applications.
Computational methods are valuable for predicting reactivity in such systems.