Docetaxel–Aconitic Anhydride Conjugate Without Coupling Reagents
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Solution Overview
Problem
Existing small molecule drugs face challenges in improving drug efficacy, side effects, and physical properties, necessitating the use of coupling reagents for chemical modification, which then require additional purification steps.
Innovation Solution
A method for synthesizing drug-organic-acid-anhydride conjugates without using coupling reagents, involving steps such as mixing aconitic anhydride with a chlorinating reagent, dissolving in a solvent, evaporating, washing with an impurity remover, and combining with the drug to form a conjugate, thereby eliminating the need for a purification step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling reagents are used for chemical modification of small molecule drugs, then drug efficacy and physical properties can be improved, but additional purification steps are required to remove the coupling reagents
Solution Approach 1:
The invention extracts and eliminates the coupling reagent from the chemical modification process. By using direct acylation with acid anhydrides or acid chlorides, the problematic coupling reagent is completely removed from the reaction system, thereby eliminating the need for its purification while maintaining the desired chemical modification of the drug molecule
Solution Approach 2:
The invention introduces a simple base (such as triethylamine or pyridine) as an intermediary to facilitate the acylation reaction without requiring complex coupling reagents. This intermediary base neutralizes the HCl byproduct and enables the reaction to proceed efficiently under mild conditions, achieving both improved drug properties and simplified purification
2Ease of manufacture
If coupling reagents are used for chemical modification, then various aspects of drugs can be improved, but the manufacturing process becomes more complex with additional purification steps
Solution Approach 1:
By extracting the coupling reagent from the process and replacing it with direct acylation using acid anhydrides or acid chlorides, the manufacturing process is simplified. This elimination removes the need for complex purification steps while maintaining full capability for chemical modification of drug molecules to improve their properties
Solution Approach 2:
The invention changes the reaction parameters by using acid anhydrides or acid chlorides as acylating agents under mild conditions with simple bases. This parameter change enables efficient chemical modification while simplifying the overall manufacturing process and improving productivity by eliminating time-consuming purification steps
3Object-affected harmful factors
If conventional chemical modification methods are used, then purification steps are required to remove coupling reagents, but the method allows for improving drug solubility and reducing toxicity
Solution Approach 1:
The invention extracts the harmful coupling reagent from the reaction system and replaces it with a simpler acylation method using acid anhydrides or acid chlorides. This elimination of the coupling reagent removes the source of contamination while maintaining the ability to modify drugs for reduced toxicity and improved solubility
Solution Approach 2:
The invention converts the potential harm of complex purification requirements into a benefit by designing a reaction system that produces minimal byproducts and requires no purification. The simple base neutralization method transforms what would be a complex purification problem into a straightforward acid-base neutralization, maintaining drug quality improvements while eliminating purification complexity
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 maintains drug efficacy while reducing toxicity and improving solubility and physical properties, allowing for formulations suitable for intravascular, subcutaneous, and oral administration, and is effective against diseases like cancer and viral infections.
Implementation Method 1
mixing aconitic anhydride with a chlorinating reagent to produce a first mixture
Implementation Method 2
evaporating the organic solvent from the dissolved mixture to produce a second mixture
Implementation Method 3
washing the second mixture with an impurity remover to remove impurities
Implementation Method 4
mixing the docetaxel with the aconitic anhydride chloride solution to produce the drug-organic-acid-anhydride conjugate
Implementation Method 5
mixing polyethylene-glycol amine with docetaxel-aconitic anhydride conjugate to produce a powder mixture
Data Source
AI summary
Synthesizing a drug-organic-acid-anhydride conjugate using docetaxel as a drug, including: mixing aconitic anhydride with a chlorinating reagent to produce a first mixture; dissolving the first mixture in an organic solvent to produce a dissolved mixture; stirring the dissolved mixture; evaporating the organic solvent from the dissolved mixture to produce a second mixture; washing the second mixture with an impurity remover to remove impurities and to produce an aconitic anhydride chloride solution; and mixing the docetaxel with the aconitic anhydride chloride solution to produce the drug-organic-acid-anhydride conjugate.