Alpha-Fluoroacrylic Acid Ester Synthesis via Carbonylation
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Solution Overview
Problem
Conventional processes for producing α-fluoroacrylic acid esters have low yields and generate significant by-products, making them inefficient and costly in terms of industrial application, particularly for medical drug synthesis where high selectivity and purity are required.
Innovation Solution
A process involving the reaction of a compound with carbon monoxide and an alcohol in the presence of a transition metal complex catalyst containing bidentate phosphine ligands and a base, which enhances starting material conversion and yield while minimizing by-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional processes are used to produce α-fluoroacrylic acid esters, then the production can be carried out with simple methods, but the yield is low (82% at most) and by-products are generated in significant amounts
Solution Approach 1:
The patent changes the reaction parameters by using a specific catalyst system (transition metal complex with bidentate phosphine ligand) and controlling reaction conditions (temperature range, pressure, molar ratios) to achieve high yield (90% or more) and high selectivity, resolving the contradiction between productivity and harmful by-products
Solution Approach 2:
The patent introduces a transition metal complex catalyst with bidentate phosphine ligand as an intermediary substance to facilitate the carbonylation reaction, enabling high conversion and selectivity while minimizing by-product formation, thus resolving the contradiction between productivity and harmful factors
2Manufacturing precision
If conventional processes are used, then the process complexity is low, but the starting material conversion is insufficient and separation is difficult
Solution Approach 1:
The patent achieves high purity (95% or more) by optimizing reaction parameters including using a specific catalyst system, controlling temperature (60-120°C), pressure (0.1-10 MPa), and molar ratios, which simplifies downstream separation while maintaining low process complexity
Solution Approach 2:
The patent replaces complex mechanical separation systems with a chemically optimized reaction process that inherently produces high-purity product, reducing the need for complex purification equipment and operations
3Productivity
If conventional processes are used, then the reaction conditions are simple, but the selectivity is low and waste materials are produced in large amounts
Solution Approach 1:
The patent achieves high starting material conversion (90% or more) and high selectivity (95% or more) by optimizing reaction parameters including catalyst selection, temperature, pressure, and molar ratios, thereby minimizing waste generation and improving productivity simultaneously
Solution Approach 2:
The patent converts the potential harm of low selectivity and by-product formation into benefit by using a specialized catalyst system that directs the reaction toward the desired product, achieving high conversion while minimizing waste materials
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
The process achieves high starting material conversion and yield with reduced by-products, resulting in high-purity α-fluoroacrylic acid esters suitable for industrial applications, particularly in medical drug synthesis.
Implementation Method 1
reacting a compound represented by formula (2) with carbon monoxide and an alcohol represented by formula (3) in the presence of a transition metal complex catalyst containing at least one bidentate phosphine ligand and a base
Data Source
AI summary
An object of the present invention is to provide a process for producing α-fluoroacrylic acid esters at a high starting material conversion and a high yield. The present invention provides, as a means to achieve the object, a process for producing a compound represented by formula (1):wherein R1 and R2 are the same or different and each represent alkyl, fluoroalkyl, aryl optionally substituted with at least one substituent, halogen, or hydrogen; and R3 represents alkyl, fluoroalkyl, or aryl optionally substituted with at least one substituent, the process comprising step A of reacting a compound represented by formula (2):wherein the symbols are as defined above, with carbon monoxide and an alcohol represented by formula (3):R3—OH (3)wherein the symbol is as defined above, in the presence of a transition metal complex catalyst containing at least one bidentate phosphine ligand and a base to thereby obtain the compound represented by formula (1).