Fluoroalkylating Agent for Mild-Condition Synthesis
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Solution Overview
Problem
Conventional fluoroalkylating agents rely on greenhouse gases like CHF3 or Freon gases, requiring special facilities and extreme low temperatures, making them environmentally unfriendly and industrially impractical.
Innovation Solution
A method using a fluoroalkylating agent represented by general formula (I) that reacts with a starting compound under mild conditions without the need for greenhouse gases or special facilities, utilizing easily available materials like trifluoroacetic acid and allowing efficient production and utilization of fluoroalkyl groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional fluoroalkylating agents (trifluoromethyl)trimethylsilane are used, then good reactivity is achieved, but environmental harm increases due to use of greenhouse gases and Freon gases
Solution Approach 1:
The patent extracts and eliminates the harmful greenhouse gas (CHF3) and Freon gas (CF3I or CBrF3) components from the fluoroalkylating agent system, replacing them with environmentally benign alternatives that maintain the desired fluoroalkylation functionality without the harmful environmental effects
Solution Approach 2:
The patent changes the chemical composition parameters of the fluoroalkylating agent, transitioning from harmful fluorinated gases to alternative compounds that achieve similar reactivity through different chemical mechanisms, thereby resolving the contradiction between reactivity and environmental harm
2Reliability
If fluoroalkylation reaction is performed with conventional agents, then fluoroalkyl group introduction is achieved, but temperature control becomes difficult due to exotherm
Solution Approach 1:
The patent introduces a catalyst as an intermediary substance that mediates the fluoroalkylation reaction, enabling the reaction to proceed under milder conditions with better heat management, thus achieving reliable fluoroalkyl group introduction while maintaining temperature control
3Power
If fluoroalkyl phenyl sulfone compound is used as fluoroalkylating agent, then excellent reactivity with aldehydes and imines is achieved, but special manufacturing facility is required due to low temperature condition
Solution Approach 1:
The patent changes the reaction temperature parameter from extremely low temperatures (-70°C to -30°C) to milder conditions, thereby eliminating the requirement for special manufacturing facilities while maintaining excellent reactivity with aldehydes and imines through the use of a catalyst
4Reliability
If anhydrous salt from hexafluoroacetone hydrate and DBU is used, then fluoroalkyl group introduction is achieved, but reaction efficiency decreases because only one of two fluoroalkyl groups can be utilized
Solution Approach 1:
The patent extracts and eliminates the structural limitation of the anhydrous salt reagent that prevents utilization of both fluoroalkyl groups, by employing a catalyst system that enables efficient fluoroalkyl group introduction with better utilization of reagent molecules, thereby improving reaction efficiency
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 approach reduces environmental impact, simplifies reaction operations, and enhances safety by controlling temperature easily, making the process economically viable and industrially superior.
Implementation Method 1
Fluoroalkylation reactions using these fluoroalkylating agents are deduced to be nucleophilic reactions
Data Source
AI summary
Problem to be Solved It is intended to provide an industrially preferable fluoroalkylating agent and use thereof. Solution The present invention provides a fluoroalkylating agent represented by the general formula (1) wherein R1 is a C1 to C8 fluoroalkyl group; R2 and R3 are each independently a C1 to C12 alkyl group or the like; Y1 to Y4 are each independently a hydrogen atom, a halogen atom, or the like; and X- is a monovalent anion. A compound of the general formula (3): R4-S-R1 having an introduced C1 to C8 fluoroalkyl group is easily obtained by reacting a compound of the general formula (2): R4-S-Z wherein R4 is a hydrocarbon group or the like; and Z is a leaving group, with the compound of the general formula (1).