Discodermolide Synthesis via Cross-Coupling and Segmentation
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Solution Overview
Problem
The scarcity of natural discodermolide limits its evaluation as an anticancer agent due to its difficult extraction, and there is a need for improved synthetic methods to produce compounds that mimic its chemical and biological activity.
Innovation Solution
The synthesis of compounds of Formula I, II, III, and IV is achieved through specific reactions involving cross-coupling metal catalysts, metallating agents, and deprotection steps, allowing for the formation of compounds that mimic the activity of discodermolide, including carbon-carbon coupling and hydrolysis processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If natural extraction of discodermolide is used, then the compound can be obtained from marine sponge, but the scarcity and difficult extraction limit its availability for evaluation
Solution Approach 1:
The patent creates synthetic copies of discodermolide and its variants through chemical synthesis methods, allowing production of the compound without relying on scarce natural sources. This enables adequate quantity for evaluation while avoiding the extraction difficulties associated with natural isolation.
Solution Approach 2:
The patent modifies the chemical structure of discodermolide by changing parameters such as substituting functional groups (e.g., converting hydroxyl groups to other moieties) and adjusting molecular properties. This allows creation of analogs with potentially improved availability and reduced extraction difficulties while maintaining biological activity.
2Adaptability or versatility
If synthetic methods are developed to produce discodermolide mimics, then compounds can be produced with mimicking activity, but the synthesis process becomes complex
Solution Approach 1:
The patent divides the synthesis of discodermolide mimics into discrete, manageable steps involving separate reactions for different portions of the molecule. This segmentation allows complex molecules to be built from simpler precursors through modular transformations, reducing the overall complexity of the synthesis process.
Solution Approach 2:
The patent employs intermediary compounds and reagents that facilitate the transformation from simple starting materials to complex discodermolide mimics. These intermediaries act as bridges, enabling stepwise construction of the target molecules through well-defined chemical reactions.
3Reliability
If natural discodermolide is used for cancer treatment evaluation, then its microtubule stabilization activity can be assessed, but the limited quantity precludes complete biological profile evaluation
Solution Approach 1:
The patent produces synthetic copies of discodermolide in sufficient quantities to conduct comprehensive biological profile evaluations. These synthetic replicants maintain the essential microtubule stabilization activity while providing adequate material for complete pharmacological and toxicological studies.
Solution Approach 2:
The patent creates structural variants and analogs of discodermolide by modifying molecular parameters such as substituent groups and stereochemistry. These parameter changes allow exploration of structure-activity relationships and expansion of the available material for diverse biological evaluations.
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
These synthetic methods enable the production of stable compounds that effectively mimic the biological activity of discodermolide, such as microtubule stabilization, which can be used to inhibit cancer cell growth, including multidrug-resistant cells, and promote apoptosis in cancer cells.
Implementation Method 1
contacting compounds of Formula i and Formula xx in the presence of a catalytically effective amount of a cross-coupling metal catalyst. The cross-coupling metal catalyst facilitates a carbon-carbon coupling of the two compounds under mild reaction conditions.
Implementation Method 2
contacting Formula i with a metallating agent. The metallating agent can be selected from a number of such agents useful for metal catalyzed cross-coupling, including boron, zinc, tin, lithium, or magnesium or aluminum
Implementation Method 3
The deprotected compound of Formula I is contacted with Cl3CCONCO. This step is commonly performed in the presence of a hydrolyzing agent, preferably Al2O3.
Data Source
AI summary
Processes for synthesizing a compound of Formula (I) are provided by reacting a compound of Formula (i) with a compound of Formula (xx).