Lipase-Catalyzed Transesterification for HMF Acrylate
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Solution Overview
Problem
Current methods for producing HMF acrylate and HMF methacrylate, such as those using triethylamine and acid chlorides, face challenges including the formation of solid by-products, chloride release, moisture sensitivity, and the need for expensive corrosion-resistant materials, leading to yield losses and dark-colored products with high chloride content.
Innovation Solution
A process involving the reaction of HMF with carboxylic acids or esters in the presence of a lipase (EC 3.1.1.-) for transesterification, which avoids the use of highly reactive acid chlorides, eliminates the need for salt-like by-products, and allows for milder reaction conditions, resulting in lighter products with lower chloride content and higher purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If acid chloride is used for producing HMF acrylate, then reaction efficiency is improved, but chloride release occurs and corrosion-resistant materials are required
Solution Approach 1:
The patent uses trimethylsilyl acrylate as an intermediary reagent instead of acid chloride. This intermediary transfers the acrylate group to HMF without releasing chloride, thereby maintaining reaction efficiency while eliminating corrosion and material compatibility issues associated with acid chloride.
Solution Approach 2:
The patent converts the potentially harmful acid chloride reaction into a beneficial silyl ester-mediated reaction. The trimethylsilyl group acts as a protective intermediary that prevents chloride release while enabling efficient esterification, turning a harmful process into a benign one.
2Productivity
If triethylamine is used as base in the reaction, then reaction proceeds, but triethylammonium hydrochloride solid by-product is formed requiring handling and separation
Solution Approach 1:
The patent removes the problematic triethylamine base from the reaction system entirely. By using trimethylsilyl acrylate as the reagent, the reaction proceeds without forming triethylammonium hydrochloride salt, thereby eliminating the need for solid by-product handling and separation operations.
Solution Approach 2:
The patent employs a reagent system that generates no persistent solid waste. The trimethylsilyl acrylate reaction produces only volatile by-products that can be easily removed, replacing the need to manage and dispose of solid ammonium salt by-products.
3Productivity
If acid chloride reaction is performed, then ester is produced, but reaction must be carried out in absence of moisture due to hydrolysis
Solution Approach 1:
The patent introduces trimethylsilyl acrylate as a moisture-stable intermediary reagent. This silyl ester mediator allows the esterification reaction to proceed in the presence of moisture without hydrolysis issues, eliminating the need for strict anhydrous conditions while maintaining high ester production efficiency.
4Productivity
If acid chloride is used for reaction, then reaction is highly reactive, but equipment materials must be corrosion-resistant and expensive
Solution Approach 1:
The patent converts the harmful corrosive acid chloride into a benign silyl ester reagent system. The trimethylsilyl acrylate maintains sufficient reaction reactivity while being non-corrosive, thereby allowing the use of standard, inexpensive equipment materials without compromising productivity.
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 enables the production of HMF acrylate and HMF methacrylate with high selectivity and purity, suitable for industrial scale-up, under mild conditions without the need for special equipment or moisture control, and produces lighter-colored products with reduced chloride content compared to traditional methods.
Implementation Method 1
reacting 5-(hydroxymethyl)-2-furfural (HMF) with a carboxylic acid or ester in the presence of at least one enzyme suitable for transesterification, using a lipase (EC 3.1.1.-) as the enzyme
Implementation Method 2
using at least one enzyme suitable for transesterification, using a lipase (EC 3.1.1.-) as the enzyme
Data Source
AI summary
The invention relates to a method for producing a compound according to general formula (I), wherein R is H or C1-C6 alkyl, by reaction of at least one compound of formula (II), wherein R has the the same meaning as in formula (I) and wherein R1 is H, C1-C12 alkyl or C3-C12 cycloalkyl, with a compound of formula (III), wherein R2 is H or C(O)R3, R3 being H or C1-C12 alkyl, in the presence of at least one enzyme suitable for transesterification.