Fluorinated Phosphorous Compounds via Mild High-Yield Synthesis
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Solution Overview
Problem
Current methods for producing fluorinated phosphorous-containing compounds, such as monomers with a carbon-carbon double bond, are cumbersome, requiring multiple steps, extreme temperatures, and reagents that are not environmentally friendly, leading to low yields and the formation of unwanted by-products.
Innovation Solution
A novel synthesis method involving a first compound reacted with a base to form an intermediate, which is then combined with a second compound to produce a third compound with a fluorinated moiety and phosphorous group, followed by silylation and transesterification to yield phosphonic acid compounds, reducing process steps and using more readily available reagents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods (direct homopolymerization, radical copolymerization, or chemical modification) are used to produce fluorinated phosphorous-containing compounds, then the compounds can be obtained, but the process requires many steps, extreme temperatures, ultraviolet light, and produces unwanted by-products with low yields
Solution Approach 1:
The synthesis is divided into two distinct stages: (1) formation of a phosphorous-containing intermediate compound by reacting a phosphorous compound with a fluoroolefin, and (2) polymerization of the intermediate compound. This segmentation allows each stage to be optimized independently, improving overall yield and reducing complexity compared to conventional one-step methods
Solution Approach 2:
A phosphorous-containing intermediate compound is introduced as a mediator between the phosphorous compound and the final polymer product. This intermediate serves as a stable, isolable species that facilitates the synthesis process, enabling high yields and simplifying purification by avoiding direct formation of the final product in complex reaction conditions
2Object-affected harmful factors
If conventional methods are used, then fluorinated phosphorous compounds can be produced, but environmentally friendly reagents are not used and harmful by-products are formed
Solution Approach 1:
The reaction conditions are changed from extreme temperatures and ultraviolet irradiation to milder conditions (room temperature or moderate heating). The reagents are changed from conventional radical initiators to nucleophilic substitution reagents, resulting in fewer harmful by-products and improved environmental compatibility while maintaining process simplicity
Solution Approach 2:
The nucleophilic substitution reaction converts potentially harmful phosphoryl chloride by-products into beneficial phosphorous-containing intermediates with high selectivity. The reaction conditions are designed to minimize harmful side reactions while maximizing the formation of the desired intermediate compound
3Ease of operation
If conventional methods requiring ultraviolet light or extreme temperatures are used, then fluorinated phosphorous compounds can be synthesized, but the processes are not user-friendly for large scale processing
Solution Approach 1:
The conventional mechanical/physical methods (ultraviolet irradiation, extreme temperature heating) are replaced with a chemical mechanism (nucleophilic substitution) that proceeds under milder, more controllable conditions. This substitution makes the process more suitable for large-scale manufacturing by eliminating the need for specialized equipment and extreme conditions
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 achieves high yields and minimizes by-products, allowing for more user-friendly and environmentally friendly large-scale processing without the need for ultraviolet radiation or extreme temperatures, resulting in multifunctional compounds suitable for ion exchange membranes and metal bonding.
Implementation Method 1
combining the first compound with a base to form an intermediate
Implementation Method 2
reacting the intermediate with a second compound to form a third compound
Implementation Method 3
the third compound from above is silylated to form a fourth compound
Implementation Method 4
the fourth compound from above is transesterified by an alcohol to form a phosphonic acid compound
Data Source
AI summary
Described herein is method of making a multifunctional compound by starting with a H—(OR)n—P(═O)(ORh1)2 and performed a series of reactions to form a functionalized phosphorous compound such as CF2═CF—CFY2—(OR)n—P(═O)(OQ)2(VIIA) CF2X3CF═CF—(OR)n—P(═O)(OQ)2(VIIB), or CF2X3CHFC(═O)—(OR)n—P(═O)(OH)2(VIB) Where: R is a C1-C4 alkenyl group; X3 is F or —(OR)n—P(═O)(OQ)2; n is 0 or 1; Y2 is —F, —Cl, —Br, —H, or a fluoroalkyl group comprising 1 to 3 carbon atoms, wherein the fluoroalkyl group optionally comprises at least one of an ether linkage, Cl, Br, or I; and Q is an alkyl group having 1 to 6 carbon atoms and optionally comprising at least one catenated ether linkage, —Si(CH3)3, —Si(CH2CH3)3, —H, a metallic cation, or a quaternary ammonium cation can be disposed on a metal surface. Such compounds may be used in generating ionomeric polymers and/or applied onto metal substrates.