Continuous Flow Peptide Synthesis at Elevated Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current peptide synthesis methods, such as microwave-assisted solid phase peptide synthesis, require high amino acid excess, leading to high costs, environmental pollution, and inefficient use of solvents and energy, especially when incorporating unnatural or structure-promoting amino acids.
Innovation Solution
A continuous flow chemical method for solid phase peptide synthesis at elevated temperatures and pressures, reducing amino acid excess to 1 to 1.5 equivalents, achieving nearly 100% coupling efficiency and low solvent consumption, while allowing for the synthesis of peptides with natural and unnatural amino acids, including those with difficult coupling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high amino acid excess (5-10 equivalents) is used in batch mode SPPS, then coupling completeness is improved, but manufacturing cost increases and environmental pollution worsens
Solution Approach 1:
The patent transitions from batch mode to continuous flow mode, enabling continuous contact between reagents and resin beads. This continuous action allows complete coupling with only 1-1.5 equivalents of amino acid, eliminating the need for high excess while maintaining coupling completeness.
Solution Approach 2:
The patent introduces dynamic control parameters including flow rate (0.1-10 mL/min), temperature (20-150°C), and pressure (1-100 bar) that can be optimized to achieve complete coupling with minimal amino acid excess, replacing the static batch process conditions.
2Reliability
If long reaction times (120-240 min) are used in batch mode, then coupling completeness is improved, but productivity decreases
Solution Approach 1:
Continuous flow mode enables constant fresh reagent supply and continuous product formation, achieving complete coupling in 5-60 minutes compared to 120-240 minutes in batch mode, thereby significantly improving productivity while maintaining coupling completeness.
Solution Approach 2:
The patent uses dynamic flow rate control (0.1-10 mL/min) and temperature adjustment (20-150°C) to optimize reaction kinetics, reducing required reaction time from 2-4 hours to 5-60 minutes while ensuring complete coupling.
3Reliability
If high amino acid excess is used, then coupling completeness is improved, but solvent consumption increases
Solution Approach 1:
The continuous flow system maintains constant reagent concentration and flow through the resin bed, achieving complete coupling with minimal solvent volume. This eliminates the need for large solvent volumes required in batch mode to dissolve high excess amino acids.
Solution Approach 2:
The patent optimizes solvent flow rate and composition dynamically to ensure complete coupling with minimal solvent consumption, replacing the static large-volume solvent systems used in batch processing.
4Loss of time
If microwave heating is applied, then reaction time is reduced, but amino acid excess requirement increases
Solution Approach 1:
The patent uses dynamic control of temperature (20-150°C), pressure (1-100 bar), and flow rate to optimize the microwave-assisted continuous flow process, achieving both reduced reaction time (5-60 min) and reduced amino acid excess (1-1.5 equivalents) simultaneously.
Solution Approach 2:
The patent changes multiple parameters including applying microwave radiation, adjusting temperature to 20-150°C, controlling pressure at 1-100 bar, and optimizing flow rate to achieve synergistic effects that reduce both time and material consumption.
5Ease of operation
If conventional SPPS is used, then ease of operation is maintained, but environmental pollution increases
Solution Approach 1:
The continuous flow system automatically maintains optimal flow rates, temperatures, and pressures, simplifying operation while dramatically reducing solvent and amino acid consumption, thereby decreasing environmental pollution.
Solution Approach 2:
The patent uses automated dynamic control of multiple parameters (flow rate, temperature, pressure) that simplifies operation while reducing waste, replacing manual batch processing that requires high material excess and generates more pollution.
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 method enables the efficient and cost-effective synthesis of high-purity peptides with reduced environmental impact, suitable for both small-scale biological measurements and large-scale production, by minimizing amino acid excess and solvent use, and effectively coupling peptides with challenging amino acids.
Implementation Method 1
In these reactors the solid support, i.e. the resin is placed in a reaction vessel, in which the solvent and dissolved reagents are transferred by a pump system or by pressurized gas
Implementation Method 2
A continuous flow chemical method for solid phase peptide synthesis at elevated temperatures and pressures, reducing amino acid excess to 1 to 1.5 equivalents, achieving nearly 100% coupling efficiency
Data Source
AI summary
The invention is directed to a continuous flow chemical method for the solid phase synthesis of peptides at elevated temperatures and pressures. The invention is based on the unexpected finding that using the continuous flow technology to the solid phase peptide synthesis the amino acid excess can be reduced to a range of 1 to 1.5 equivalents and peptides of high purity can be synthesized with practically complete couplings and in good yields if the synthesis is performed at elevated temperature and pressure. According to the invention nearly 100% coupling can be reached also when using low amino acid excess during the peptide synthesis and even in the case of peptides comprising strongly structure promoting amino acids the yields are excellent.