Base-Promoted Synthesis of Phenazines and their Cytotoxic Activity on U87MG Cells
Xu Chen1,2, Zhenhua Xiang3, Hangxiao Fu3
1Department of Neurosurgery, The Affiliated Hospital of Yunnan University, Kunming, 650000, China.
Current Organic Synthesis
|July 22, 2026
Summary
A new, efficient method synthesizes phenazines from nitroarenes and arylamines without transition metals. This environmentally friendly approach offers a straightforward alternative for producing these important heterocyclic compounds.
Area of Science:
- Organic Chemistry
- Heterocyclic Chemistry
- Materials Science
Background:
- Phenazines are crucial heterocyclic compounds found in natural products and vital industrial materials like sensors and dyes.
- Current synthesis methods for phenazines often involve harsh conditions, complex procedures, and expensive transition metals, necessitating simpler alternatives.
Purpose of the Study:
- To develop a novel, efficient, and environmentally friendly method for synthesizing phenazine compounds.
- To provide a straightforward and accessible protocol for producing phenazines from readily available starting materials.
Main Methods:
- The synthesis involved reacting commercially available nitroarenes and arylamines at 100 °C using NaN(SiMe3)2 as a base.
- Anti-proliferative effects of synthesized compounds were evaluated using the Cell Counting Kit-8 (CCK-8) assay.
Main Results:
- Fourteen phenazine derivatives were successfully synthesized in moderate to good yields.
- Compounds 3ca and 3ha demonstrated notable cytotoxic activity against U87MG cells.
Conclusions:
- A novel, transition metal-free, and oxidant-free method for phenazine synthesis has been established.
- The presented protocol is operationally simple, efficient, and environmentally friendly, offering advantages over existing methods.
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