Ascorbic Acid Derivatives via Epoxide Ring-Opening

The patent modifies the chemical structure of ascorbic acid derivatives by changing the substituent groups (R1-R6) to achieve optimal balance between stability and minimal coloration/odor. This involves systematic variation of chemical parameters such as introducing specific alkyl, alkoxy, or hydroxyl groups at different positions on the molecule to enhance stability while suppressing harmful degradation products

The patent creates composite ascorbic acid derivative structures combining multiple functional groups (hydroxyl, alkoxy, alkyl) in specific configurations. These composite molecular structures achieve synergistic effects where the combination of different substituents provides both enhanced stability and reduced coloration/odor compared to simpler derivatives

The patent extracts and eliminates the complex phosphate and glucoside moieties from ascorbic acid structures, replacing them with simpler alkyl and alkoxy groups. This extraction of unnecessary complex functional groups maintains the desired stability benefit while dramatically simplifying the production process and reducing costs

The patent employs simpler, more cost-effective chemical structures that can be produced through straightforward synthesis methods using readily available starting materials. The design prioritizes economical production routes with fewer steps and higher yields, making the derivative accessible for widespread cosmetic application