Functionalized Bile Acids Synthesis via Pentafluorophenyl Carbonate
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Solution Overview
Problem
Current methods for preparing functionalized bile acids are limited by the use of toxic coupling reagents and the generation of undesirable byproducts, such as urea, which complicates purification and increases impurities.
Innovation Solution
A method involving direct activation of bile acid carboxylic acids using pentafluorophenyl carbonate as a coupling agent to generate intermediate bile acid derivatives, followed by attachment of functional groups, such as small molecule or macromolecular amines, to produce functionalized bile acid materials with therapeutic and material applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional coupling reagents are used to functionalize bile acids, then the functionalization reaction can proceed, but toxic byproducts such as urea are generated which complicates purification and increases impurities
Solution Approach 1:
The patent removes the harmful urea byproduct generation mechanism from the reaction system by replacing traditional coupling reagents (EDC, HATU, HBTU) with pentafluorophenyl carbonate. This extraction of the harmful chemical pathway eliminates toxic byproduct formation while maintaining the desired amide bond formation between bile acid carboxylic acids and amine functional groups.
Solution Approach 2:
The patent changes the chemical parameters of the coupling agent from traditional carbodiimide or phosphonium-based reagents to pentafluorophenyl carbonate. This parameter change in the coupling reagent chemistry fundamentally alters the reaction pathway to produce non-toxic byproducts (carbon dioxide and pentafluorophenol) instead of urea, thereby simplifying purification and reducing impurities.
2Manufacturing precision
If traditional coupling reagents like EDC, HATU, or HBTU are used, then amide bond formation can be achieved, but the reaction mixture becomes complex requiring extensive purification
Solution Approach 1:
The patent extracts the purification complexity from the overall process by eliminating urea byproduct formation. The use of pentafluorophenyl carbonate produces only carbon dioxide and pentafluorophenol as byproducts, which are easily removed, thereby extracting the complex purification steps that would otherwise be required to remove urea and its derivatives.
Solution Approach 2:
The patent changes the reaction chemistry parameters by using pentafluorophenyl carbonate instead of traditional coupling reagents. This parameter change results in a cleaner reaction mixture with fewer byproducts, directly improving product purity and reducing the complexity of purification processes required to achieve pharmaceutical-grade materials.
3Manufacturing precision
If multiple purification steps are implemented to remove byproducts, then product purity can be improved, but the synthesis time and process complexity increase
Solution Approach 1:
The patent extracts the time-consuming purification steps from the synthesis process by preventing byproduct formation in the first place. By using pentafluorophenyl carbonate that produces easily removable byproducts, the patent eliminates the need for multiple extensive purification steps, thereby reducing overall synthesis time while maintaining high product purity.
Solution Approach 2:
The patent changes the chemical parameters of the coupling reaction to produce a cleaner reaction profile with fewer byproducts. This parameter change in the coupling reagent chemistry directly reduces the time required for purification operations, as the reaction mixture requires less processing to achieve the desired product purity, thereby reducing total synthesis time.
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
This approach simplifies the synthesis of functionalized bile acid materials, reduces toxicity, and avoids unwanted byproducts, enabling their use as therapeutic carriers, antimicrobial agents, and materials that can cross the blood-brain barrier.
Implementation Method 1
directly activating a carboxylic acid of a bile acid compound using a coupling agent comprising an amide or ester compound, thereby generating an intermediate bile acid derivative material
Implementation Method 2
attaching a functional group material to the intermediate bile acid derivative material by reacting the functional group material and the intermediate bile acid derivative material, thereby generating a functionalized bile acid material
Data Source
AI summary
The subject disclosure is directed to functionalized bile acids, preparation thereof, and usage thereof for therapeutic and material applications. In one embodiment, a method of generating functionalized bile acid materials can comprise directly activating a carboxylic acid of a bile acid compound using a coupling agent comprising an amide or ester compound, thereby generating an intermediate bile acid derivative material. The method can further comprise attaching a functional group material to the intermediate bile acid derivative material by reacting the functional group material and the intermediate bile acid derivative material, thereby generating a functionalized bile acid material.