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6-Deoxy-6-fluoro-L-ascorbic acid: crystal structure and oxidative degradation
J Madaj1, Y Nishikawa, V P Reddy
1Institute of Pathology, Case Western Reserve University, Cleveland, OH, USA.
Carbohydrate Research
|December 16, 2000
Summary
6-deoxy-6-fluoroascorbic acid (6) shows similar properties to ascorbic acid, enabling its use in identifying oxidation products. This compound is a sensitive tool for assessing ascorbic acid breakdown in biological systems.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Structural Chemistry
Background:
- Ascorbic acid oxidation products contribute to protein modification in aging and oxidative stress-related diseases.
- Understanding ascorbic acid catabolism is crucial for studying these conditions.
Purpose of the Study:
- To evaluate the feasibility of using 6-deoxy-6-fluoroascorbic acid (6) as a tool to identify ascorbic acid degradation products.
- To characterize compound 6 and compare its properties to native ascorbic acid.
Main Methods:
- Crystallographic analysis of compound 6.
- UV spectroscopy and oxidation kinetics studies at varying pH.
- High-field (750 MHz) 19F NMR spectroscopy to detect oxidation products.
Main Results:
- Compound 6 exhibited crystallographic, UV, and oxidation kinetic properties similar to ascorbic acid.
- 19F NMR spectroscopy successfully identified five to six novel fluorinated products after oxidation of compound 6.
- These findings suggest compound 6's utility in studying ascorbic acid metabolism.
Conclusions:
- 6-deoxy-6-fluoroascorbic acid (6) is a viable and sensitive probe for investigating ascorbic acid catabolism.
- The use of 19F NMR spectroscopy with compound 6 offers a powerful method for detecting oxidation products in vivo.