Chromophore Acceptor Synthesis via Lithiated Tin Intermediate
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Solution Overview
Problem
There is a need for scalable, high-yield synthetic methods for producing nonlinear optical (NLO) chromophore-polymer composite materials, which are essential for high-speed phase modulation in electro-optic devices due to the limitations of existing methods like vinyl-lithiation and hydrolysis.
Innovation Solution
A method involving the reaction of tributyl(1-ethoxyvinyl) tin with n-butyllithium at controlled temperatures, followed by reactions with 2,2,2-trifuoroacetophenone, quenching with acid, and subsequent reaction with malononitrile in the presence of a base to produce 2-dicyanomethylene-3-cyano-4-methyl-5-phenyl-5-perfluoromethyl-2,5-dihydrofuran, optimizing conditions such as solvent use and acid concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods like vinyl-lithiation and hydrolysis are used to synthesize chromophores, then the synthesis can be performed with standard procedures, but the product yield is low
Solution Approach 1:
The patent applies parameter changes by modifying reaction conditions including using specific temperature ranges (0°C to room temperature), controlling acid concentration (5N to 7N HCl), and optimizing the sequence of reagent addition. These parameter adjustments transform the conventional low-yield synthesis into a high-yield process while maintaining procedural simplicity
Solution Approach 2:
The patent introduces an intermediary approach by using a multi-step reaction sequence where tributyl(1-ethoxyvinyl) tin serves as a key intermediate compound. This intermediary enables the transformation of starting materials into the desired chromophore product with high yield, acting as a bridge in the synthesis pathway
2Ease of manufacture
If existing synthesis methods are used for NLO chromophores, then the process can be maintained with current technology, but scalability is limited
Solution Approach 1:
The patent applies segmentation by dividing the synthesis into distinct, manageable steps: (i) reaction of tributyl(1-ethoxyvinyl) tin with n-butyllithium, (ii) reaction with 2,2,2-trifluoroacetophenone, (iii) quenching with acid, and (iv) reaction with malononitrile. This segmented approach enables each step to be optimized and scaled independently, improving overall scalability
Solution Approach 2:
The patent implements parameter changes that enable scalability by optimizing reaction conditions for larger-scale production, including temperature control during lithiation, acid concentration for quenching, and stoichiometric ratios of reagents, transforming the process from lab-scale to scalable manufacturing
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 method achieves high yields and scalability, improving the production efficiency of NLO chromophores suitable for electro-optic devices, particularly in environments requiring high photostability.
Implementation Method 1
reacting tributyl(1-ethoxyvinyl) tin with n-butyllithium at a temperature of between about −10° C. and about 10° C. to produce a first reaction product
Implementation Method 2
reacting the first reaction product with 2,2,2-trifuoroacetophenone to produce a second reaction product
Implementation Method 3
quenching the second reaction product with an acid to produce 3-hydroxy-3-phenyl-4,4,4-trifluoro-2-butanone
Implementation Method 4
reacting the 3-hydroxy-3-phenyl-4,4,4-trifluoro-2-butanone with malononitrile in the presence of base to produce 2-dicyanomethylene-3-cyano-4-methyl-5-phenyl-5-perfluoromethyl-2,5-dihydrofuran
Data Source
AI summary
The present disclosure is directed, in general, to synthesizing optionally substituted 2-dicyanomethylene-3-cyano-4-methyl-5-phenyl-5-perfluoromethyl-2,5-dihydrofuran comprising (i) reacting tributyl (1-ethoxyvinyl) tin with n-butyllithium at a temperature of between −30° C. and 10° C. to produce a first reaction product; (ii) reacting the first reaction product with 2,2,2-trifuoroacetophenone to produce a second reaction product: (iii) quenching the second reaction product with an acid to produce 3-hydroxy-3-phenyl-4,4,4-trifluoro-2-butanone; and (iv) reacting the 3-hydroxy-3-phenyl-4,4,4-trifluoro-2-butanone with malononitrile in the presence of base to produce 2-dicyanomethylene-3-cyano-4-methyl-5-phenyl-5-perfluoromethyl-2,5-dihydrofuran.