Palladium-Catalyzed One-Pot Synthesis of Aromatic Amide Carboxylic Acids
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Solution Overview
Problem
Industrial methods for producing aromatic amide carboxylic acid derivatives require multi-step reactions, making them inefficient for industrial production.
Innovation Solution
A method involving the reaction of an aromatic amide halide derivative with carbon monoxide, using palladium or palladium compounds and phosphine compounds, to produce aromatic amide carboxylic acid derivatives through fewer process steps, with optional alkylation and amidation steps, to achieve the desired product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to produce aromatic amide carboxylic acid derivatives, then the products can be obtained, but the production process requires multiple steps which reduces efficiency and increases complexity
Solution Approach 1:
The patent combines multiple reaction steps into a single one-pot process. Specifically, the aromatic halide derivative, amine, base, and water are simultaneously present in the reaction system, allowing the palladium-catalyzed coupling and hydrolysis reactions to occur concurrently, thereby reducing the number of separate production steps and improving overall efficiency
Solution Approach 2:
The palladium catalyst system performs multiple functions: it catalyzes the coupling reaction between aromatic halide and amine to form aromatic amide, and simultaneously facilitates the hydrolysis reaction with water to produce the final carboxylic acid derivative. This multi-functional catalytic approach eliminates the need for separate reaction vessels and steps
2Manufacturing precision
If conventional multi-step methods are used, then product formation is achieved, but the time required for production increases
Solution Approach 1:
The reaction system maintains continuous useful action by having all reactants (aromatic halide derivative, amine, base, and water) present simultaneously throughout the reaction process. The palladium catalyst continuously facilitates both the coupling and hydrolysis reactions without interruption, eliminating the time losses associated with transferring intermediates between separate reaction steps
3Ease of manufacture
If existing production methods are applied, then aromatic amide carboxylic acid derivatives can be produced, but the process requires separation and purification steps which increase operational complexity
Solution Approach 1:
The patent merges the product formation and purification advantages into a single operational step. The one-pot reaction system produces the final aromatic amide carboxylic acid derivative directly in the reaction mixture, and the simultaneous presence of all reactants and the catalytic system ensures high selectivity, reducing the need for complex separation and purification operations
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 allows for the efficient production of aromatic amide carboxylic acid derivatives with a halogen atom through fewer process steps, making it suitable for industrial production and providing a useful intermediate for pest-control amide derivatives.
Implementation Method 1
using a palladium compound as a catalyst
Data Source
AI summary
The invention provides a method for producing an aromatic amide carboxylic acid derivative represented by the following Formula (2), including a step of reacting an aromatic amide halide derivative represented by the following Formula (1) with carbon monoxide. In the following Formulae (1) and (2), R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; X1 represents a fluorine atom or a cyano group; X2 represents a halogen atom; and n represents an integer of from 0 to 3.