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Related Experiment Video

Updated: Mar 30, 2026

High-Density DNA and RNA microarrays - Photolithographic Synthesis, Hybridization and Preparation of Large Nucleic Acid Libraries

High-Density DNA and RNA microarrays - Photolithographic Synthesis, Hybridization and Preparation of Large Nucleic Acid Libraries

Published on: August 12, 2019

Ugi-Type Reaction Enables Access to Fused Imidazole Derivatives for DNA-Encoded Library Technology.

Hao Guo¹, Zitao Li¹, Gaonan Wang¹

¹WuXi AppTec, 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, China.

Bioconjugate Chemistry

|March 28, 2026

Summary

Researchers developed a catalyst-free method to synthesize N-fused imidazopyridines using a multicomponent reaction. This DNA-compatible approach efficiently creates diverse heterocyclic scaffolds, valuable for DNA-encoded library technology.

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Area of Science:

Organic Chemistry
Medicinal Chemistry
Chemical Biology

Background:

N-fused imidazopyridines are privileged scaffolds in medicinal chemistry.
DNA-encoded library (DEL) technology enables rapid screening of vast chemical libraries.
Efficient and versatile synthesis methods are crucial for DEL applications.

Purpose of the Study:

To develop a novel, catalyst-free method for synthesizing diverse N-fused imidazopyridines.
To demonstrate the DNA-compatibility of the developed synthetic strategy.
To explore the utility of this method for constructing scaffolds in DEL technology.

Main Methods:

Utilized a Ugi-type multicomponent reaction.
Employed trimethylsilyl cyanide (TMSCN) as a functional isonitrile equivalent.
Conducted the reaction in water without additional catalysts, leveraging in-situ desilylation activation.

Main Results:

Achieved a DNA-compatible synthesis of diverse N-fused imidazopyridines.
Demonstrated broad substrate scope for various aldehydes and heterocyclic amidines.
Exhibited excellent chemoselectivity in the multicomponent reaction.

Conclusions:

The developed catalyst-free Ugi-type reaction provides an efficient route to N-fused imidazopyridines.
This method is suitable for constructing privileged heteroaromatic scaffolds for DNA-encoded library applications.
The DNA-compatibility and broad scope highlight the method's practical utility in drug discovery.