Single-Screw Amide and Peptide Synthesis Without Solvent Heating
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Solution Overview
Problem
Conventional amide and peptide synthesis methods require high temperatures, solvents, and long reaction times, leading to inefficiencies and purity issues, especially in large-scale operations.
Innovation Solution
A solvent-free continuous process using a single screw reactor at room temperature with residence times ranging from 10 seconds to 300 seconds, employing coupling agents like EDC.HCl, DCC, HOBt, CDI, and DIC, achieving high conversion and yield of amides and peptides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional batch synthesis methods are used with high temperature and solvents, then reaction conversion is improved, but energy consumption increases and product purity decreases
Solution Approach 1:
The invention changes the temperature parameter from high temperature (conventional) to room temperature (20-35°C), and changes the reaction mode from batch to continuous flow in a screw reactor. This parameter change achieves high conversion (>95%) while significantly reducing energy consumption, as the process operates at ambient temperature without requiring heating infrastructure.
2Reliability
If conventional batch synthesis methods are used with long reaction times, then reaction completeness is improved, but productivity decreases
Solution Approach 1:
The invention implements continuous flow synthesis in a screw reactor, where reactants continuously pass through the reaction zone. This continuous action mode achieves both high reaction completeness (>95% conversion) and high productivity, as the reaction occurs continuously without batch interruptions, and the residence time is precisely controlled to ensure complete reaction.
3Object-generated harmful factors
If solvent-free conditions are used, then environmental friendliness is improved, but reaction efficiency typically decreases
Solution Approach 1:
The invention uses mechanical activation through the screw reactor's rotating screw mechanism to provide the necessary energy for reaction under solvent-free conditions. The mechanical force from the screw conveyor creates friction and shear forces that activate the reactants, replacing the need for solvents while maintaining high reaction efficiency (>95% conversion) and productivity.
4Use of energy by moving object
If room temperature synthesis is used, then energy consumption is reduced, but reaction rate typically decreases
Solution Approach 1:
The invention introduces dynamic mechanical activation through the rotating screw mechanism in the screw reactor. The dynamic mechanical forces (friction, shear, compression) generated by the rotating screw compensate for the lower thermal energy at room temperature, maintaining high reaction rates while consuming minimal energy. The residence time (10-300 seconds) is optimized to ensure complete reaction at ambient temperature.
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 process achieves greater than 95% conversion and 49-95% yield of amides and peptides with high purity, reducing energy consumption and eliminating the need for further purification, making it economically and environmentally friendly.
Implementation Method 1
The amide and peptide bond formation serves as a fundamental reaction in chemistry, and is practically useful for the synthesis of macromolecules, complex peptides, food additives, and polymers and many more.
Implementation Method 2
A straightforward synthetic strategy for amide bond formation is the coupling of carboxylic acid and amine using coupling reagents.
Data Source
AI summary
The present invention relates to a novel process for the solvent free continuous synthesis of amides and peptides. More particularly, the invention relates to a process for synthesizing amides and peptides using coupling reagents where the process is done at room temperature with lower residence time and solvent free synthesis, producing enhanced yields and purity products.