Micro-electro-flow Reactor for Oxidant-Free C-C Coupling
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Solution Overview
Problem
Current methods for synthesizing symmetrical biaryls, such as daclatasvir, are inefficient due to high temperatures, excess oxidants, and long reaction times in batch processes, which limit scalability and product quality.
Innovation Solution
A continuous micro-electro-flow reactor system using a serpentine tunnel with patterned nickel and platinum nanoparticles on copper plates, enabling ultra-fast, oxidant-free C—C coupling reactions by optimizing electrode distance and surface area for efficient electron transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional batch processes are used for symmetrical biaryl synthesis, then high temperatures and excess oxidants can be applied, but reaction times are long (4-48 h) and productivity is low
Solution Approach 1:
The patent replaces conventional thermal batch heating with electrochemical activation in a micro-flow reactor system. Electrical current directly activates the nickel catalyst and promotes C-C coupling without requiring high temperatures or prolonged reaction times, achieving complete conversion in minutes rather than hours
Solution Approach 2:
The invention changes the reaction parameters by using electrochemical potential control instead of thermal heating. By applying controlled electrical current in a micro-flow system, the reaction proceeds under milder conditions with dramatically reduced time requirements while maintaining high conversion efficiency
2Reliability
If batch processes with excess oxidants are used, then catalyst activation is achieved, but oxidant wastage increases and environmental impact worsens
Solution Approach 1:
The patent substitutes chemical oxidants with electrical current for catalyst activation. The electrochemical system directly regenerates the active nickel species through electron transfer at the electrode surface, eliminating the need for stoichiometric oxidants and their associated waste disposal issues
Solution Approach 2:
The electrochemical reactor system self-regenerates the active catalyst species through continuous electron transfer at the electrode surface. The system uses electrical energy to maintain catalyst activity without requiring external chemical oxidants, creating a self-sustaining catalytic cycle
3Productivity
If conventional heating methods are used, then reaction can proceed, but energy consumption increases and temperature control becomes less efficient
Solution Approach 1:
The invention replaces thermal energy input with electrical energy input delivered directly to the reaction mixture through electrodes. This electrochemical activation method provides more efficient energy transfer to the catalyst and reactants, reducing overall energy consumption while accelerating the reaction
Solution Approach 2:
The system changes from thermal parameter control (temperature) to electrical parameter control (current, voltage, power density). This allows precise control of reaction rate through electrical parameters while operating at lower overall energy input compared to conventional heating methods
4Productivity
If micro-flow reactor with patterned electrodes is used, then electron transfer efficiency increases and reaction time decreases, but device complexity increases
Solution Approach 1:
The patent employs a micro-flow reactor with patterned electrode surfaces that create enhanced surface area and improved mass transfer. The micro-scale geometry and surface patterning increase the effective contact area between electrodes and reaction mixture, boosting electron transfer efficiency despite the more complex structure
Solution Approach 2:
The invention transitions from conventional two-electrode parallel plates to a multi-layer stacked electrode configuration. This three-dimensional arrangement increases the effective reaction surface area and improves electron transfer pathways while maintaining a compact reactor footprint
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 approach significantly reduces reaction time and improves yield, achieving daclatasvir synthesis in 138 minutes with enhanced product quality and scalability, compared to traditional batch processes which take days.
Implementation Method 1
continuous micro-electro-flow reactor system for ultra-fast, oxidant free, C—C coupling reactions
Implementation Method 2
optimizing electrode distance and surface area for efficient electron transfer
Implementation Method 3
electrochemistry a surface phenomenon also enables the unique activation of reagents
Data Source
AI summary
The present invention relates to a continuous micro-electro-flow reactor system for ultra-fast, oxidant free, C—C coupling reaction for making symmetrical biaryls and analogs thereof. This invention further relates to the said process for preparation of antiviral drug, daclatasvir of general formula I.