On-DNA Mannich Reaction for DNA-Encoded Library Synthesis

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Biotechnology

Background:

• The Mannich reaction is a versatile method for synthesizing β-amino ketones, which are valuable pharmaceutical building blocks.
• DNA-encoded libraries (DELs) offer a powerful platform for high-throughput screening of small molecules for drug discovery.

Purpose of the Study:

• To optimize conditions for performing the Mannich reaction directly on DNA-conjugated molecules.
• To explore the utility of this on-DNA Mannich reaction for generating diverse chemical libraries.

Main Methods:

• Optimization of reaction parameters for the Mannich reaction in a DNA-templated system.
• Synthesis of DNA-conjugated aldehydes and subsequent reaction with various amine and ketone building blocks.
• Assessment of DNA integrity post-reaction to ensure compatibility with library production.

Main Results:

• Successfully optimized on-DNA Mannich reaction conditions that preserve DNA integrity.
• Demonstrated the ability to react DNA-conjugated aldehydes with diverse amine and ketone building blocks.
• Established a viable route for library production using the on-DNA Mannich reaction.

Conclusions:

• The Mannich reaction can be effectively performed on DNA, creating a novel method for DEL synthesis.
• This approach significantly expands the chemical space accessible through DNA-encoded library technology.
• The developed methodology holds promise for accelerating the discovery of new drug candidates.