Peptide Synthesis Using Segmented Protecting Groups
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Solution Overview
Problem
Current methods for generating pharmaceutically relevant peptides are inefficient and lack specificity in producing desired compounds, leading to impurities and low yields.
Innovation Solution
A multi-step process involving reactions between specific compounds of formulas I-A, I-B, I-C, I-D, and I-E, or their salts, to form compound VIII or its salt, using coupling agents and amino protecting groups to achieve high purity and specificity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current methods for generating pharmaceutically relevant peptides are used, then the process is simpler, but the efficiency and specificity are low leading to impurities and low yields
Solution Approach 1:
The patent divides the peptide synthesis into multiple discrete steps with specific protecting group strategies. Each amino acid residue is introduced sequentially with controlled protection and deprotection steps, allowing high specificity at each stage while maintaining overall synthesis efficiency through systematic progression.
Solution Approach 2:
The patent employs pre-installed protecting groups on amino acid building blocks before coupling reactions. These protecting groups (such as Boc, Fmoc, Cbz) are strategically placed to prevent unwanted side reactions during synthesis, ensuring high specificity before the actual peptide bond formation occurs.
2Quantity of substance
If current methods are used, then fewer reagents are required, but the yield and purity of the desired compound are low
Solution Approach 1:
The patent uses coupling agents (such as HATU, HBTU, EDC) as intermediaries to facilitate peptide bond formation between amino acid residues. These coupling agents enable high-yield, high-specificity amide bond formation while minimizing side reactions, thereby simultaneously improving both yield and purity of the final peptide product.
Solution Approach 2:
The patent optimizes reaction parameters including solvent selection (DMF, DCM, NMP), temperature control, and stoichiometry of reagents to maximize both yield and purity. By carefully adjusting these parameters at each synthesis step, the method achieves high efficiency while maintaining excellent product quality.
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 process enables the efficient and specific synthesis of compound VIII or its salt with high purity, reducing the need for purification methods like column chromatography and improving yield.
Implementation Method 1
reacting a compound of formula I-A or a salt thereof with a compound of formula I-B or a salt thereof to form a compound of formula I-C
Implementation Method 2
converting the compound of formula I-C to a compound of formula I-D wherein the amino protecting group Y1 is converted to an amino group
Implementation Method 3
reacting the compound of formula I-D or a salt thereof with a compound of formula I-E or a salt thereof to form the compound of formula VIII
Data Source
AI summary
The present technology provides methods of generating the peptides, and pharmaceutically acceptable salts of the peptides and intermediates thereof. In some embodiments, the peptide is D-Arg-2′6′-Dmt-Lys-Phe-NH2.