Methyl 2-Fluoroacrylate Synthesis with Scalable Hydrofluorination
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Solution Overview
Problem
Current methods for synthesizing methyl 2-fluoroacrylate (MFA) suffer from low yields and purity, and the use of highly toxic starting materials like methyl fluoroacetate makes them economically unviable, while existing hydrofluoric acid-based fluorination reagents face challenges in scalability and purification.
Innovation Solution
A process involving the use of hydrofluorinating reagents such as DMPU-HF, KHSO4-HF, and polymer-supported HF complexes, along with catalysts like Au and Lewis acids, to synthesize MFA with high purity and yield, utilizing routes like alkyl propiolate, halogen exchange, alkyl acrylate-epoxide, and difluoropropionic acid routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current commercial routes using methyl fluoroacetate are used, then MFA can be synthesized, but the process involves highly toxic starting materials and is economically unviable
Solution Approach 1:
The patent extracts and removes the toxic methyl fluoroacetate starting material from the synthesis route, replacing it with non-toxic alternatives like methyl propiolate or methyl acrylate. This extraction of the harmful component allows the synthesis to proceed without the associated toxicity and economic viability issues.
Solution Approach 2:
The patent converts the previously harmful route into a beneficial one by replacing toxic reagents with safe alternatives. The new hydrofluorination methods using reagents like DMPU-HF or KHSO4-HF transform the synthesis process from harmful to beneficial, achieving both safety and economic viability.
2Reliability
If literature synthetic routes are used, then MFA can be produced, but the yields and purity are low
Solution Approach 1:
The patent changes key reaction parameters including using novel hydrofluorination reagents (DMPU-HF, KHSO4-HF), optimizing catalyst systems (gold catalysts, Lewis acids), and adjusting reaction conditions (temperature, solvent systems) to achieve high yields and purity. These parameter changes transform the low-quality literature routes into high-quality industrial processes.
Solution Approach 2:
The patent introduces intermediary substances and catalysts that facilitate the reaction and improve product quality. Novel intermediates and catalyst systems act as mediators to enhance both yield and purity, resolving the contradiction between production capability and manufacturing precision.
3Reliability
If existing hydrofluoric acid-based fluorination reagents are used, then fluorination can be achieved, but scalability and purification are limited
Solution Approach 1:
The patent employs polymer-supported HF complexes that utilize porous material structures. These porous catalysts enable easy filtration and separation, dramatically improving scalability and purification. The porous structure allows the catalyst to be easily removed from the reaction mixture, solving the manufacturing limitations of existing reagents.
Solution Approach 2:
The patent uses disposable, easy-to-remove reagent systems that simplify the manufacturing process. The novel hydrofluorination reagents are designed to be easily separable or consumable, eliminating complex purification steps and enabling scalable production. This approach trades reagent reusability for manufacturing simplicity and scalability.
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 yield and purity of MFA synthesis, reducing the need for toxic materials and simplifying purification, making it economically viable and industrially applicable.
Implementation Method 1
contacting an alkyl propiolate compound of Formula 1 with a hydrofluorination agent in the presence of a catalyst to form the compound of Formula 2
Implementation Method 2
in the presence of a catalyst to form the compound of Formula 2
Implementation Method 3
contacting a compound of Formula 4 with a hydrofluorination agent in the presence of a Lewis acid catalyst
Data Source
AI summary
Methods for the synthesis of methyl 2-fluoroacrylate (MFA) are provided. The methods include use of various hydro-fluorination agents using a variety of starting materials and reaction schemes. The methyl 2-fluoroacrylate prepared by the methods described herein can further be used to prepare patiromer calcium sorbitex.