Cyclopeptide Synthesis Using Disposable Catalysts
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Solution Overview
Problem
The conventional method for preparing cyclopeptides with the RGD motif is costly due to the high expense of coupling agents required, and the resulting peptides often contain contaminants that necessitate extensive purification, limiting their widespread application.
Innovation Solution
A novel catalytic method for synthesizing cyclopeptides using a water-soluble catalyst, reducing the need for expensive coupling agents and improving product purity, allowing for more cost-effective and practical large-scale production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling agents are used to catalyze peptide synthesis, then the peptide bonds can be formed, but the production cost increases and product purity decreases
Solution Approach 1:
The patent replaces expensive, persistent coupling agents with inexpensive, easily removable catalysts (such as DCC or EDC) that can be disposed of after a single use. These catalysts form transient intermediates that facilitate peptide bond formation but do not remain in the final product, eliminating the need for extensive purification and reducing both cost and contamination.
Solution Approach 2:
The patent introduces catalysts as intermediary substances that temporarily mediate the peptide coupling reaction. These intermediaries (catalyst-activated carboxyl groups) facilitate bond formation between amino acids but are subsequently removed, leaving no harmful residues in the final peptide product.
2Reliability
If coupling agents are used to catalyze peptide synthesis, then the peptide bonds can be formed, but extensive purification is required to remove contaminants
Solution Approach 1:
The patent employs catalysts that are designed to be transient and easily removable. These catalysts perform their function during the reaction and then can be completely removed through simple washing or filtration, leaving the peptide product free from contaminating residues that would require complex purification procedures.
Solution Approach 2:
The patent converts the potential harm of catalyst residues into a benefit by selecting catalysts whose byproducts are benign and easily removable. The catalyst decomposition products are either water-soluble or can be filtered out, transforming what could be a contamination problem into a simple separation task.
3Productivity
If large amounts of coupling agents are used, then the reaction can proceed, but the production cost increases significantly
Solution Approach 1:
The patent optimizes the catalyst-to-substrate ratio to achieve maximum reaction efficiency at minimal catalyst dosage. By adjusting parameters such as catalyst concentration, activation time, and reaction temperature, the patent achieves high conversion rates with small amounts of catalyst, eliminating the need for large excesses that would increase cost.
Solution Approach 2:
The patent uses inexpensive catalysts that can be employed in catalytic amounts rather than stoichiometric quantities. These catalysts are regenerated at the end of the reaction cycle or decompose into benign products, allowing for their reuse or easy disposal without significant cost impact.
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 enables the production of cyclopeptides at a lower cost with improved purity, facilitating their application in various fields, including topical and cosmetic skin care, by reducing the amount of catalysts needed and eliminating the need for extensive purification.
Implementation Method 1
the synthesis of the cyclopeptide is catalyzed by a catalyst to reduce production cost and improve product purity
Data Source
AI summary
A method for preparing a cyclopeptide and a cyclopeptide preparing by the method are disclosed. The method includes the following steps: (a) providing compounds represented by formulas (I-1) and (I-4); (b) performing a reaction between the compounds of formulas (I-1) and (I-4) to obtain a compound represented by formula (I-5); (c) performing a reaction between the compound of formula (I-5) and the compound represented by formula (I-6) to obtain a compound represented by formula (I-7); (d) performing a cyclization reaction of the compound of formula (I-7) with a catalyst of formula (II) and deprotection to obtain a compound represented by formula (III), wherein the compounds of formulas (I-1), (I-4) to (I-7), (III) and the catalyst of formula (II) are as defined in the specification.