Curcumin Dimers with Modified Phenolic Groups
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Solution Overview
Problem
Unmodified curcumin exhibits poor water and plasma solubility, limiting its therapeutic efficacy, and most curcumin derivatives are symmetric, lacking reactive groups at the phenolic position which restricts their biological activity and utility.
Innovation Solution
Development of curcumin dimers with modified phenolic groups, such as acrylate, methacrylate, carboxylic acid, alkyne, N-Hydroxysuccinimide, azide, and triazole PEG linkages, allowing for improved solubility and bioconjugation with biopolymers and synthetic polymers, enhancing bioactivity and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If curcumin is chemically modified to improve water solubility, then water solubility is improved, but the phenolic groups are modified which may reduce antioxidant properties
Solution Approach 1:
The patent applies local quality by modifying only specific phenolic groups (one or both) while leaving others unmodified. This allows selective improvement of solubility through modification of certain positions while preserving antioxidant activity from unmodified phenolic groups, thus resolving the contradiction between solubility improvement and antioxidant property maintenance.
Solution Approach 2:
The patent employs asymmetry by creating curcumin derivatives with non-symmetric modification patterns - where one phenolic group is modified and the other is not, or where different types of modifications are applied to different groups. This asymmetric approach enables differential functional properties, allowing improved solubility from modified groups while maintaining antioxidant activity from unmodified groups.
2Adaptability or versatility
If curcumin is chemically modified to add reactive groups for bioconjugation, then biological activity and utility are enhanced, but the complexity of the molecule increases
Solution Approach 1:
The patent applies segmentation by dividing the curcumin molecule into distinct functional regions: unmodified phenolic groups that provide antioxidant activity and modified phenolic groups that provide reactive functionality for bioconjugation. This segmentation allows each region to perform its specific function independently, enhancing overall biological activity without excessive complexity.
Solution Approach 2:
The patent implements multi-functionality by creating curcumin derivatives that simultaneously possess antioxidant properties (from unmodified phenolic groups) and bioconjugation capability (from modified groups with reactive functional groups). This multi-functional design enhances biological activity and versatility while keeping the molecular structure relatively manageable through strategic modification.
3Ease of manufacture
If symmetric curcumin derivatives are used, then the synthesis is simplified, but reactive groups at phenolic position are lacking which limits biological utility
Solution Approach 1:
The patent applies local quality by implementing selective modification at specific phenolic positions rather than uniform modification throughout the molecule. This allows the synthesis to remain relatively simple by modifying only specific locations while introducing reactive groups that enhance biological utility, thus resolving the contradiction between synthesis simplicity and biological versatility.
Data Source
AI summary
The invention relates to novel curcumin and tetrahydrocurcumin derivatives, which have been modified at one phenolic group to incorporate more-reactive groups. The curcumin and tetrahydrocurcumin derivatives are in the form of monomers, dimmers, and polymers.