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Updated: Nov 15, 2025

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
Modular Approach to Substituted Pyridoazepinones.
Valentin S Dorokhov1, Samir Z Zard1
1Laboratoire de Synthèse Organique, CNRS, UMR 7652, Ecole Polytechnique, Palaiseau Cedex, 91128, France.
A new synthetic route using xanthate addition-transfer provides access to valuable pyridoazepinone compounds. This method is flexible, scalable to gram quantities, and yields good results from simple starting materials.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
Background:
- Pyridoazepinones are important heterocyclic compounds.
- Their synthesis is challenging and they are underexplored in medicinal chemistry.
Purpose of the Study:
- To develop a general and flexible synthetic route to substituted pyridoazepinones.
- To enable easier access to these potentially valuable molecules.
Main Methods:
- Utilized a xanthate addition-transfer process.
- Employed readily available starting materials.
Main Results:
- Achieved generally good yields of substituted pyridoazepinones.
- Demonstrated good functional group tolerance.
- Successfully scaled the preparation to gram quantities.
Conclusions:
- The developed synthetic route is efficient and versatile.
- This method facilitates the preparation of pyridoazepinone scaffolds for further research.
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