Fluoro Vinyl Ether Synthesis Through One-Step Halogenation
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Solution Overview
Problem
The conventional synthesis method of fluoro vinyl ether involves multiple steps, which can be improved for simplification.
Innovation Solution
A method for producing vinyl ether and haloether involves reacting a compound represented by formula (1) with a halogenating agent and optionally a catalyst, followed by a reducing agent, to form compounds represented by formulas (4a) and (5a) or (4b) and (5b), respectively, with specific organic groups and halogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple steps are used in the conventional synthesis method of fluoro vinyl ether, then the synthesis can be completed with established reactions, but the synthetic method becomes complex and inefficient
Solution Approach 1:
The patent combines multiple separate reaction steps (substitution, reduction, tosylation, desorption) into a single-step synthesis method using a halogenating agent and base, directly converting fluoroalkoxide salt to fluoro vinyl ether without intermediate isolation steps
Solution Approach 2:
The patent employs a universal reaction system where a halogenating agent (such as iodine monochloride) and base can be used to synthesize various fluoro vinyl ethers with different R1 groups from different fluoroalkoxide salts, making the method applicable to a broad range of substrates
2Manufacturing precision
If multiple steps are used in the conventional synthesis method, then each reaction can be optimized independently, but the overall synthesis time and process complexity increase
Solution Approach 1:
The patent merges four separate reaction steps into one concerted transformation that occurs in a single reaction vessel without intermediate isolation, thereby eliminating the time required for multiple workup and purification steps while maintaining product purity
3Device complexity
If a simple one-step method is used, then the synthesis process is simplified, but the reaction conditions and reagents must be highly effective
Solution Approach 1:
The patent uses specific parameter combinations (halogenating agent with iodine monochloride, base with CsF or K2CO3, solvent with acetonitrile, temperature at 0°C to room temperature) to enable the one-step transformation to proceed reliably with high yields
Solution Approach 2:
The patent employs a halogenating agent as an intermediary that facilitates the conversion of fluoroalkoxide salt to fluoro vinyl ether through a proposed mechanism involving halogenation followed by elimination, enabling the one-step transformation
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 simplifies the synthesis process and provides a straightforward route to produce vinyl ether and haloether, enhancing efficiency and reducing the number of steps.
Implementation Method 1
reacting a compound represented by formula (1) with a halogenating agent
Implementation Method 2
followed by a reducing agent, to form compounds represented by formulas (4a) and (5a) or (4b) and (5b)
Data Source
AI summary
An object of the present invention is to provide a vinyl ether, a simple method for producing the vinyl ether, a haloether used for producing the vinyl ether, and a method for producing the vinyl ether. The object can be achieved by producing a haloether by a method comprising step 1a of allowing a compound represented by formula (1): R1O- Y+ (1) wherein Y+ represents a cation and R1 is an organic group, to react, in the presence of a halogenating agent, with a compound represented by formula (2a): wherein R2a and R3a each independently represent H or an alkyl group, R4a represents H, a halogen, or an organic group, and X1a represents a halogen other than F.