Cyclohexanone Derivatives for Versatile Chiral Synthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of methods for preparing cyclohexanone derivatives with a hydroxy group in position 3 and a hydrocarbon derivative in position 5, which are useful starting materials for cyclohexenone synthesis, as existing methods require different starting materials and reagents.
Innovation Solution
A new class of cyclohexanones with specific configurations, including optically active forms, is synthesized using a process involving treatment of trans ketones with optically active sodium or potassium alkoxides and sulfonyl chloride, or by reacting achiral di-ketones with amines in the presence of titanium or zirconium complexes and chiral ligands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing methods are used to prepare cyclohexenones, then cyclohexenones can be obtained, but different starting materials and reagents are required, making the process complex and less versatile
Solution Approach 1:
The patent makes cyclohexanone derivatives of formula (I) universal starting materials that can produce various cyclohexenones through different substitution patterns. By establishing that these specific cyclohexanone derivatives serve as common precursors for multiple cyclohexenone products, the invention achieves multi-functionality and versatility in synthetic pathways.
Solution Approach 2:
The invention changes the key parameter of the starting material structure by specifying cyclohexanone derivatives with particular substitution patterns (formula I). This structural parameter change enables a unified starting material approach that simplifies the overall synthesis strategy while maintaining the ability to produce diverse cyclohexenone products.
2Manufacturing precision
If cyclohexanone derivatives of formula (I) are synthesized with specific configurations, then optically active compounds can be produced, but the synthesis process requires specific reagents and conditions
Solution Approach 1:
The patent employs chiral auxiliaries or catalysts in the synthesis of cyclohexanone derivatives to pre-establish the desired optical configuration during the formation of asymmetric centers. This preliminary action of introducing chirality early in the synthesis pathway ensures that the final product achieves the required configurational precision without requiring complex post-synthesis resolution steps.
Solution Approach 2:
The invention uses chiral intermediaries such as chiral auxiliaries, chiral catalysts, or chiral pool compounds during the synthesis process. These intermediary chiral elements transfer their stereochemical information to the cyclohexanone derivative, enabling precise configurational control while simplifying the overall manufacturing process by avoiding the need for complex separation and purification of enantiomers.
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 process allows for the production of cyclohexanones with desired configurations, enabling efficient synthesis of optically active compounds and various cyclohexenones, overcoming the limitations of previous methods by using the cyclohexanones as starting materials.
Implementation Method 1
treating trans ketones with optically active sodium or potassium alkoxides
Implementation Method 2
reacting achiral di-ketones with amines in the presence of titanium or zirconium complexes and chiral ligands
Data Source
AI summary
The present invention relates to a cyclohexanone derivative of formula (I) in the form of any one of its isomers or mixture thereof. The invention concerns also the preparation and the use of said derivative. The invention's compound is a useful starting material for the preparation of various optically active compounds.