Partially Fluorinated Alcohol Synthesis from Epoxide Ring Opening
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Solution Overview
Problem
Current methods do not effectively prepare fluorohydrins from fluorinated epoxides or produce fluorinated carbonate esters from fluorohydrins, which are valuable for applications in electronic devices and other industrial uses.
Innovation Solution
A method involving the reaction of fluorinated epoxides with nucleophilic fluorinating agents, such as HF or Olah's reagent, to form partially fluorinated alcohols, which can then be converted into fluorinated carbonate esters using carboxylating agents, specifically utilizing fluorinating agents like HF or Olah's reagent with epoxides like 2,3-epoxy-1,1,1-trifluoropropane or 1,3,3,3-tetrafluoropropene to produce compounds like CF3CH(OH)CH2F or CF3CH(OH)CHF2, and subsequently forming fluorinated carbonate esters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fluorinated epoxides are reacted with nucleophilic fluorinating agents to prepare fluorohydrins, then fluorinated alcohols can be produced for use in electronic devices and batteries, but the method is unknown and unexplored in prior art
Solution Approach 1:
The patent applies preliminary action by first preparing fluorinated epoxides through epoxidation of fluorinated alkenes using mCPBA, which then serves as the substrate for subsequent ring-opening with nucleophilic fluorinating agents. This two-stage approach (epoxidation followed by ring-opening) establishes a reliable pathway to fluorohydrins that was previously unknown.
Solution Approach 2:
The patent uses mCPBA as an intermediary substance to convert fluorinated alkenes into fluorinated epoxides, which then act as intermediates for the ring-opening reaction with nucleophilic fluorinating agents. This intermediary approach enables the transformation through well-understood mechanistic steps, improving reliability.
2Productivity
If fluorohydrins are converted to fluorinated carbonate esters using carboxylating agents, then valuable intermediates for electronic devices can be produced, but the reaction pathway is unknown in prior art
Solution Approach 1:
The patent establishes a continuous synthetic pathway where fluorinated alkenes are converted to epoxides, then to fluorohydrins, and finally to fluorinated carbonate esters. This continuous transformation sequence maximizes productivity by eliminating gaps between synthetic steps and maintaining material flow throughout the process.
Solution Approach 2:
The patent employs parameter changes by varying the nucleophilic fluorinating agent (HF, CsF, KF, TBAF) and the carboxylating agent (phosgene, triphosgene, triphosphite) to optimize the reaction conditions for producing fluorinated carbonate esters, making the methodology adaptable and easier to manufacture.
3Adaptability or versatility
If ring opening of fluorinated epoxides is attempted with nucleophilic fluorinating agents, then fluorinated alcohols can be formed, but the outcome was silent and unexplored in prior literature
Solution Approach 1:
The patent demonstrates universality by showing that fluorinated epoxides can serve multiple functions: as intermediates for fluorohydrin synthesis, as precursors for fluorinated carbonate esters, and as building blocks for various fluorinated compounds. This multi-functionality greatly enhances the adaptability and synthetic utility of fluorinated epoxides.
Solution Approach 2:
The patent replaces uncertain empirical trial-and-error approaches with a well-defined mechanistic pathway based on nucleophilic ring-opening of epoxides. By substituting the unknown outcome with a understood chemical mechanism (nucleophilic attack at the less substituted carbon), manufacturing precision is achieved through predictable product formation.
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 enables the production of fluorinated alcohols and carbonate esters with specific structures, suitable for use as solvents and intermediates in electronic devices, particularly in lithium ion batteries, offering improved electrochemical stability and compatibility with battery components.
Implementation Method 1
reacting a fluorinated epoxide with a fluorinating agent to form a partially fluorinated alcohol
Implementation Method 2
converted into fluorinated carbonate esters using carboxylating agents
Data Source
AI summary
A method for preparing a partially fluorinated alcohol, comprises reacting an epoxide: wherein R1, R2, R3 and R4 are independently selected from the group comprising H, F, Cl, Br, I, CF3, alkyl, fluoroalkyl, haloalkyl with a fluorinating agent.