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A combinatorial synthesis of tyrphostins via the "directed sorting" method
1Department of Chemistry, IRORI, La Jolla, California 92037-1031, USA.
Biotechnology and Bioengineering
|April 1, 1999
Summary
Researchers synthesized a 432-compound library using AG 490 tyrphostin templates and solid-phase synthesis. This method enabled discrete product isolation and efficient library generation for drug discovery.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Chemical Biology
Background:
- The AG 490 tyrphostin scaffold is a key pharmacophore in drug discovery.
- Efficient synthesis of diverse compound libraries is crucial for identifying novel therapeutic agents.
- Solid-phase synthesis offers advantages for combinatorial chemistry and automated library production.
Purpose of the Study:
- To develop and validate a novel solid-phase synthesis strategy for generating a library of AG 490-based compounds.
- To demonstrate the utility of radiofrequency ID tags and directed sorting for producing discrete library members.
- To assess the yield, purity, and structural integrity of the synthesized library.
Main Methods:
- Solid-phase organic synthesis utilizing a 432-member reactor array.
- Incorporation of radiofrequency memory ID tags for individual reactor tracking.
- A multi-step reaction sequence involving 29 distinct chemical transformations.
- "Directed sorting" of reactors based on ID tag information for selective pooling.
- Cleavage from solid support, lyophilization, and purification of final compounds.
- Characterization using Nuclear Magnetic Resonance (NMR), mass spectrometry, and Thin-Layer Chromatography (TLC).
Main Results:
- Successfully synthesized a 432-member library based on the AG 490 tyrphostin template.
- Achieved discrete isolation of each compound using radiofrequency ID tags and directed sorting.
- Characterization confirmed the structural identity of library members.
- TLC analysis indicated high purity (single major organic compound) for most samples.
- Obtained substantial yields (5-19 mg) for approximately 88% of the synthesized compounds.
Conclusions:
- The developed solid-phase synthesis approach combined with directed sorting is effective for generating discrete, high-purity compound libraries.
- This methodology facilitates the efficient production of AG 490-based libraries, paving the way for larger-scale synthesis.
- The strategy holds significant potential for accelerating drug discovery efforts by providing diverse chemical entities for screening.