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Parallel SFC/MS-MUX screening to assess enantiomeric purity
Derek B Laskar1, Lu Zeng, Rongda Xu
1Department of Analytical Chemistry and Technology, Takeda San Diego, Inc., San Diego, California 92121, USA.
Chirality
|April 3, 2008
Summary
High-throughput chiral chromatography accurately determines enantiomeric excess (ee) in diverse compound libraries. This automated system supports drug discovery by enabling rapid, reliable analysis of trace enantiomers.
Area of Science:
- Analytical Chemistry
- Pharmaceutical Sciences
Background:
- Accurate determination of enantiomeric excess (ee) is crucial for drug development.
- Existing methods for high-throughput ee analysis face challenges in trace enantiomer identification and quantitation.
Purpose of the Study:
- To evaluate the enantiomeric excess of two synthesized compound libraries.
- To demonstrate the utility of an enhanced automated high-throughput chiral chromatography system for drug discovery programs.
Main Methods:
- Utilized a four-channel parallel supercritical fluid chromatography/mass spectrometry system with a multiplexed ion source (SFC/MS-MUX).
- Analyzed diverse compound libraries across multiple chiral stationary phases (CSPs) and organic modifiers.
- Implemented system enhancements for automated trace enantiomer identification and quantitation.
Main Results:
- Observed reversal of enantiomer elution order across different CSPs and modifiers.
- Demonstrated high % ee accuracy even with minor enantiomer eluting before major enantiomer without baseline resolution.
- Showcased agreement between automated and baseline-resolved separations for % ee values.
Conclusions:
- The enhanced SFC/MS-MUX system provides high-throughput, accurate ee determinations.
- The developed methods are valuable for supporting drug discovery and development programs.
- Automated trace enantiomer analysis is feasible and reliable.
