Related Experiment Videos
Traceless, self-cleaving solid- and solution-phase parallel synthesis of 3,4,7-trisubstituted
E Laborde1, B T Peterson, L Robinson
1Telik, Inc., 750 Gateway Boulevard, South San Francisco, CA 94080, USA.
Journal of Combinatorial Chemistry
|November 13, 2001
Summary
A novel parallel synthesis method creates diverse 3,4-dihydroquinoxalin-2-ones using resin-bound amino acids. This efficient approach preserves chirality and enables high-throughput library generation.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Synthetic Chemistry
Background:
- 3,4-dihydroquinoxalin-2-ones are important scaffolds in medicinal chemistry.
- Developing efficient and diverse synthetic routes is crucial for drug discovery.
Purpose of the Study:
- To develop a novel, high-throughput parallel synthesis methodology for 3,4-dihydroquinoxalin-2-ones.
- To introduce three points of diversity in the synthesized compounds.
Main Methods:
- Utilized resin-bound alpha-amino acids for the first diversity point.
- Employed a combination of solid- and solution-phase chemistry for subsequent modifications.
- Key step involved intramolecular cyclization and traceless cleavage from solid support.
- N-alkylation in solution introduced the third substituent, with scavenger resin for excess reagent removal.
Main Results:
- Successfully synthesized disubstituted 3,4-dihydroquinoxalin-2-ones.
- Achieved parallel synthesis of libraries with three points of diversity.
- Preserved the chiral integrity of starting alpha-amino acids.
Conclusions:
- The developed methodology is efficient for generating diverse 3,4-dihydroquinoxalin-2-one libraries.
- The process operates under mild conditions (room temperature, no strong acids or inert atmosphere).
- Facilitates high-throughput synthesis crucial for drug discovery and chemical biology research.