Catalytic CO2 Conversion to Nitrogen Compounds
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Solution Overview
Problem
Current methods for converting carbon dioxide into nitrogen compounds, such as amidines and nitrogen heterocycles, face challenges in replacing all C-O bonds with C-N, C-H, and C-O bonds efficiently, requiring multiple steps and toxic reagents, and there is a need for a process that can achieve this in a single step with high selectivity and yield.
Innovation Solution
A process involving the reaction of amines with carbon dioxide in the presence of a silane compound and a nucleophilic agent, using a catalyst to replace the oxygen atoms of CO2 with hydrogen and nitrogen/oxygen atoms, resulting in nitrogen compounds with up to 100% yield in a single step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to convert CO2 into nitrogen compounds, then the transformation can be achieved, but multiple steps and toxic reagents are required, reducing efficiency and increasing complexity
Solution Approach 1:
The patent combines multiple reaction steps into a single integrated process. The copper catalyst system simultaneously performs CO2 activation, C-O bond cleavage, and C-N bond formation in one pot, eliminating the need for separate reduction and functionalization steps required in conventional methods
Solution Approach 2:
The copper catalyst system exhibits multi-functionality by performing multiple chemical transformations simultaneously: activating CO2, cleaving C-O bonds, forming C-N bonds, and facilitating the overall conversion of CO2 to nitrogen compounds like formamidines and heterocycles in a single reaction system
2Manufacturing precision
If conventional methods are used to replace all C-O bonds in CO2, then complete transformation is achieved, but the process requires multiple steps and toxic reagents
Solution Approach 1:
The patent merges C-O bond cleavage and C-N bond formation into a single catalytic cycle using copper complexes. The reaction system achieves complete replacement of C-O bonds with C-N bonds through one integrated process step, avoiding multi-step sequences with toxic reagents
Solution Approach 2:
The invention changes key reaction parameters by using copper catalysts with specific ligands (such as N-heterocyclic carbenes or phosphines) and controlling reaction conditions (temperature, pressure, solvent) to enable direct C-O bond cleavage and C-N bond formation under milder and simpler conditions than conventional methods
3Manufacturing precision
If CO2 is transformed into nitrogen compounds with high yield, then selectivity is improved, but the process requires integrating multiple functions in a single step
Solution Approach 1:
The copper catalyst system is designed to perform multiple functions simultaneously: CO2 coordination and activation, C-O bond cleavage, nitrogen source incorporation, and product formation. This multi-functional catalysis achieves high selectivity for nitrogen compounds while integrating what would otherwise require separate reaction steps
Solution Approach 2:
The copper catalyst acts as an intermediary that facilitates the complex transformation by providing a coordinated environment for CO2 activation and subsequent reaction with nitrogen sources. The catalyst mediates the difficult C-O bond cleavage and directs the formation of specific C-N bonds, achieving high selectivity through controlled intermediate species
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 efficiently converts CO2 into nitrogen compounds like formamidines and heterocycles with high yield and selectivity, overcoming the limitations of existing methods by integrating functionalization and reduction in a single step, and can produce labeled compounds for various applications.
Implementation Method 1
the only reaction during which all C-O bonds are broken and new bonds are formed is the reduction of CO2 to methane
Implementation Method 2
the use of catalyst to accelerate the reactions
Data Source
Figure 1
AI summary
The present invention relates to a method for preparing nitrogen compounds using carbon dioxide, and to the use of said method in the production of vitamins, pharmaceutical products, adhesives, acrylic fibres, synthetic leathers, pesticides, herbicides, antifungal agents and fertilisers. The invention also relates to a method for producing vitamins, pharmaceutical products, adhesives, acrylic fibres, synthetic leathers, pesticides, herbicides, antifungal agents and fertilisers, which includes a step of preparing nitrogen compounds using the method of the invention. The invention further relates to a method for preparing labelled nitrogen compounds using carbon dioxide and to the uses thereof.