2-Fluoro-1,3-Benzodithiol Tetraoxide Derivative Monofluoromethylating Agent
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Solution Overview
Problem
Conventional methods for introducing a monofluoromethyl group, such as using 1-fluoro-1,1-bis(phenylsulfonyl)methane, have limitations including low yield and restricted applicability to specific reactions, particularly the aldol addition reaction, and generate significant byproducts.
Innovation Solution
A novel 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative is developed, which allows for high-yield conversion of fluoromethylene groups to monofluoromethyl groups and enables broader reaction applicability, including aldol addition reactions, without producing byproducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional agents like 1-fluoro-1,1-bis(phenylsulfonyl)methane are used to introduce monofluoromethyl groups, then the conversion can be achieved, but the yield is low and significant byproducts are generated
Solution Approach 1:
The patent changes the chemical structure parameters of the fluorinating agent by introducing electron-withdrawing groups (such as CF3, COOR, CN, or halogen atoms) at positions 5, 6, or 7 of the benzodithiol ring. This structural modification increases the electrophilicity of the fluoromethylene group, enabling high-yield conversion while reducing byproduct formation through more selective reactivity
Solution Approach 2:
The invention creates a composite functional structure combining the benzodithiol core with electron-withdrawing substituents and fluoromethylene groups. This composite approach allows the molecule to simultaneously provide stable handling properties through the benzodithiol framework while delivering highly reactive fluoromethylene transfer capability through the substituted functional groups
2Adaptability or versatility
If conventional fluorinating agents are used, then monofluoromethyl group introduction is possible, but the reaction applicability is limited to specific reaction types
Solution Approach 1:
The patent designs the 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative to perform multiple functions: it can transfer fluoromethylene groups to various substrates including carbonyl compounds (aldehydes, ketones), imines, and other electrophiles. The electron-withdrawing substituents enhance the agent's ability to participate in diverse reaction mechanisms, making it a universal fluoromethylating reagent for multiple reaction types while maintaining high reliability
3Adaptability or versatility
If conventional methods are used for aldol addition reactions with fluorinating agents, then the reaction cannot be performed, but with the novel derivative the aldol addition becomes feasible
Solution Approach 1:
The patent modifies the electronic parameters of the fluorinating agent by adding electron-withdrawing groups that increase the electrophilicity of the fluoromethylene carbon. This parameter change enables the agent to accept nucleophilic attack from enolates in aldol addition reactions, a transformation that was impossible with conventional less electrophilic fluorinating agents, while achieving high yields through controlled reactivity
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
The 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative provides a more versatile and efficient monofluoromethylating agent, enabling wider reaction compatibility and higher yields compared to conventional agents, with reduced byproduct formation.
Implementation Method 1
The 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative can be used to introduce a monofluoromethyl group into an organic compound
Data Source
AI summary
A 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative as a monofluoromethyl group introduction agent that is effective as an intermediate in pharmaceutical and agrochemical synthesis, a production method thereof, and a production method of a monofluoromethyl group-containing compound using this 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative are provided. The 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative represented by the following general formula (1) (wherein R1, R2, R3, and R4 each independently represent a hydrogen atom, a straight-chain or branched alkyl group having 1 to 4 carbon atoms, a straight-chain or branched alkyloxy group having 1 to 4 carbon atoms, a halogen atom, a nitro group, or a cyano group), the production method thereof, and various monofluoromethyl group-containing compounds are manufactured using this 2-fluoro-1,3-benzodithiol 1,1,3,3-tetraoxide derivative as a monofluoromethylating agent.