Alpha-Substituted Acrylate Synthesis Without Transmetallation
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Solution Overview
Problem
Existing synthetic routes for alpha-substituted acrylates involve transmetallation steps, which are not efficient and direct reactions with halomethylacrylates are not known.
Innovation Solution
A process that directly reacts organozinc compounds with alpha-(halomethyl) acrylates to synthesize alpha-substituted acrylates without transmetallation, using a nucleophilic substitution reaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmetallation steps are used in the synthesis of alpha-substituted acrylates, then the reaction can proceed through known routes, but the process becomes complex and less efficient
Solution Approach 1:
The invention extracts and eliminates the transmetallation step from the known synthetic route. By directly reacting organozinc compounds with halomethylacrylates, the patent removes the intermediate transmetallation step to organocopper compounds, thereby simplifying the process while maintaining productivity.
Solution Approach 2:
Instead of following the conventional route that requires transmetallation to organocopper compounds before reacting with halomethylacrylates, the invention inverts the approach by enabling the direct reaction of organozinc compounds with halomethylacrylates, reversing the traditional sequence and eliminating unnecessary steps.
2Ease of manufacture
If a direct reaction of organozinc compounds with halomethylacrylates is implemented, then the process becomes more efficient and direct, but this reaction pathway was previously unknown and required new methodology
Solution Approach 1:
The invention changes the reaction parameters by enabling a previously unknown direct reaction pathway. By modifying the reaction conditions and methodology to allow direct coupling of organozinc compounds with halomethylacrylates, the patent achieves process simplicity without requiring complex transmetallation steps.
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 efficiently synthesizes alpha-substituted acrylates, providing a direct and efficient route that avoids transmetallation steps.
Implementation Method 1
A process that directly reacts organozinc compounds with alpha-(halomethyl) acrylates to synthesize alpha-substituted acrylates without transmetallation, using a nucleophilic substitution reaction.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
The present disclosure relates to a process for preparing an alpha-substituted acrylate, the process comprising: a) combining starting materials comprising an alpha-(halomethyl) acrylate and an organozinc compound, thereby forming a product comprising the alpha-substituted acrylate.