Edaravone Crosslinked Dimer Manufacturing for Aqueous Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Edaravone, a potent radical scavenger, is unstable in aqueous solutions and prone to oxidation, limiting its clinical application due to poor yield in crosslinking reactions with alkyl groups.
Innovation Solution
A method involving the reaction of edaravone derivatives with specific compounds to form stable crosslinked products, improving yield and stability, including steps such as reacting compounds represented by formulas (1), (2), and (3) with various substituents to produce compounds like 3-methyl-1-ethyl-5-pyrazolone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If edaravone is used as a reactive oxygen species removing agent, then the antioxidation effect is improved, but the stability in aqueous solution deteriorates
Solution Approach 1:
The patent applies composite materials by crosslinking edaravone molecules through alkenyl groups to form a dimeric structure. This composite approach combines multiple edaravone units with crosslinking bridges, creating a new molecular architecture that maintains the antioxidation functionality while improving aqueous solution stability through reduced oxidation susceptibility.
2Stability of the object's composition
If crosslinking reaction is performed to improve stability, then the stability is improved, but the yield of the reaction deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically optimizing reaction conditions including using specific solvents (acetonitrile, dimethylformamide, dimethyl sulfoxide), controlling temperature ranges (0-50°C), adjusting molar ratios of reactants, and selecting appropriate bases (triethylamine, N,N-diisopropylethylamine). These parameter optimizations collectively improve the crosslinking reaction yield while maintaining the stability benefits.
Solution Approach 2:
The patent uses intermediaries in the form of specific bases (triethylamine, N,N-diisopropylethylamine) that facilitate the crosslinking reaction between edaravone and alkyl halides. These intermediary substances enable the reaction to proceed more efficiently by acting as catalysts or reaction mediators, thereby improving yield without compromising the stability of the final product.
3Stability of the object's composition
If edaravone is stored in reducing aqueous solution to maintain stability, then the stability is improved, but the complexity of storage conditions increases
Solution Approach 1:
The patent applies the taking out principle by removing the vulnerable phenyl group from the edaravone structure and replacing it with alkyl groups through crosslinking. This extraction of the oxidation-prone aromatic component and its replacement with saturated alkyl chains eliminates the need for complex reducing storage conditions while maintaining stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the yield and stability of the compound, maintaining antioxidation effects even in aqueous solutions, addressing the instability issues of edaravone.
Implementation Method 1
reacting a compound represented by formula (1) shown below with a compound represented by formula (2) shown below to obtain a compound represented by formula (3)
Data Source
AI summary
The present invention provides a method for manufacturing a compound, with which it is possible to improve the yield of the compound. The method for manufacturing a compound according to the present invention includes a first step of reacting a compound represented by formula (1) shown below with a compound represented by formula (2) shown below to obtain a compound represented by formula (3) shown below: