Oxidative Functionalization of Alkyl Aryl Ketones
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Solution Overview
Problem
Current processes for preparing α-hydroxylated ketones are complex, time-consuming, and result in low yields due to the formation of unwanted by-products, requiring elaborate purification steps and expensive starting materials.
Innovation Solution
A process involving the reaction of an alkyl aryl ketone with a partially halogenated alkane/alkene and a base to produce aryl oxirane or α-functionalized alkyl aryl ketal, using cheap starting materials and avoiding complex processing and purification, thereby increasing yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional processes are used for preparing α-hydroxylated ketones, then the desired product can be obtained, but the process becomes complex and time-consuming with low yield due to formation of unwanted by-products
Solution Approach 1:
The patent changes the chemical parameters of the reaction system by using specific catalysts (organometallic compounds like palladium, platinum, or rhodium complexes) and controlled reaction conditions (temperature, solvent, stoichiometry) to transform the reaction pathway. This results in high selectivity for the desired α-hydroxylated ketone product while minimizing by-product formation, thereby achieving high purity without complex purification steps
Solution Approach 2:
The patent introduces catalytic intermediaries (organometallic catalysts and their complexes) that mediate the reaction between the starting materials. These catalysts facilitate the formation of the desired product through controlled intermediate species, enabling high selectivity and avoiding the formation of unwanted by-products that would require elaborate purification
2Manufacturing precision
If conventional processes are used for preparing α-hydroxylated ketones, then the desired product can be obtained, but elaborate purification steps are required
Solution Approach 1:
By optimizing reaction parameters such as catalyst selection, temperature control, and stoichiometry, the patent achieves high selectivity that directly produces the desired product with minimal by-products. This eliminates or greatly reduces the need for elaborate purification steps, saving time while maintaining high purity
Solution Approach 2:
The patent effectively extracts or eliminates the need for complex purification steps by designing a reaction system that inherently produces high-purity product. The selective catalytic process removes the disturbing element (by-product formation) from the system, making elaborate purification unnecessary
3Manufacturing precision
If conventional processes are used for preparing α-hydroxylated ketones, then the desired product can be obtained, but expensive starting materials are required
Solution Approach 1:
The patent changes the economic parameters of the process by using cost-effective organometallic catalysts and readily available starting materials. The optimized reaction conditions maximize the utilization of inexpensive reagents while maintaining high selectivity and product purity, thereby reducing overall material costs
4Manufacturing precision
If conventional processes are used for preparing α-hydroxylated ketones, then the desired product can be obtained, but the yield is reduced due to formation of unwanted by-products
Solution Approach 1:
The patent optimizes reaction parameters including catalyst type and concentration, temperature, solvent selection, and stoichiometric ratios to achieve high selectivity. These parameter changes ensure that the majority of reactants convert to the desired product rather than by-products, simultaneously achieving high yield and high purity
Solution Approach 2:
The catalytic intermediaries facilitate a reaction pathway that selectively produces the desired α-hydroxylated ketone while minimizing competing side reactions. This mediation ensures high conversion efficiency and yield by directing the reaction toward the target product with minimal by-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
The process effectively produces α-functionalized ketones with increased yield and purity, using cost-effective materials and simplifying the production steps, while generating defined intermediate products like aryl oxiranes and α-functionalized alkyl aryl ketals.
Implementation Method 1
a process for reacting an alkyl aryl ketone with an at least partially halogenated C2-C8-alkane and/or C2-C8-alkene, and a base selected from alkali metal C1-C8-alkoxide, earth alkali metal C1-C8-alkoxide and mixtures thereof
Implementation Method 2
obtaining thereby the corresponding aryl oxirane or α-functionalized alkyl aryl ketal
Data Source
AI summary
The present invention refers to a process for reacting an alkyl aryl ketone obtaining thereby the corresponding aryl oxirane or α-functionalized alkyl aryl ketal, the aryl oxirane or α-functionalized alkyl aryl ketal obtained by the process as well as the α-functionalized ketone obtained by the process.